diff --git a/api/expression-parser.api b/api/expression-parser.api
index eeb4e0e..759b6b2 100644
--- a/api/expression-parser.api
+++ b/api/expression-parser.api
@@ -116,6 +116,7 @@ public final class org/hisp/dhis/lib/expression/ast/NamedFunction : java/lang/En
 	public static final field d2_hasUserRole Lorg/hisp/dhis/lib/expression/ast/NamedFunction;
 	public static final field d2_hasValue Lorg/hisp/dhis/lib/expression/ast/NamedFunction;
 	public static final field d2_inOrgUnitGroup Lorg/hisp/dhis/lib/expression/ast/NamedFunction;
+	public static final field d2_inUserGroup Lorg/hisp/dhis/lib/expression/ast/NamedFunction;
 	public static final field d2_lastEventDate Lorg/hisp/dhis/lib/expression/ast/NamedFunction;
 	public static final field d2_left Lorg/hisp/dhis/lib/expression/ast/NamedFunction;
 	public static final field d2_length Lorg/hisp/dhis/lib/expression/ast/NamedFunction;
@@ -1383,6 +1384,7 @@ public abstract interface class org/hisp/dhis/lib/expression/spi/ExpressionFunct
 	public abstract fun d2_hasUserRole (Ljava/lang/String;Ljava/util/List;)Z
 	public abstract fun d2_hasValue (Lorg/hisp/dhis/lib/expression/spi/VariableValue;)Z
 	public abstract fun d2_inOrgUnitGroup (Ljava/lang/String;Lorg/hisp/dhis/lib/expression/spi/VariableValue;Ljava/util/Map;)Z
+	public abstract fun d2_inUserGroup (Ljava/lang/String;Ljava/util/List;)Z
 	public abstract fun d2_lastEventDate (Lorg/hisp/dhis/lib/expression/spi/VariableValue;)Lkotlinx/datetime/LocalDate;
 	public abstract fun d2_left (Ljava/lang/String;Ljava/lang/Integer;)Ljava/lang/String;
 	public abstract fun d2_length (Ljava/lang/String;)I
@@ -1444,6 +1446,7 @@ public final class org/hisp/dhis/lib/expression/spi/ExpressionFunctions$DefaultI
 	public static fun d2_hasUserRole (Lorg/hisp/dhis/lib/expression/spi/ExpressionFunctions;Ljava/lang/String;Ljava/util/List;)Z
 	public static fun d2_hasValue (Lorg/hisp/dhis/lib/expression/spi/ExpressionFunctions;Lorg/hisp/dhis/lib/expression/spi/VariableValue;)Z
 	public static fun d2_inOrgUnitGroup (Lorg/hisp/dhis/lib/expression/spi/ExpressionFunctions;Ljava/lang/String;Lorg/hisp/dhis/lib/expression/spi/VariableValue;Ljava/util/Map;)Z
+	public static fun d2_inUserGroup (Lorg/hisp/dhis/lib/expression/spi/ExpressionFunctions;Ljava/lang/String;Ljava/util/List;)Z
 	public static fun d2_lastEventDate (Lorg/hisp/dhis/lib/expression/spi/ExpressionFunctions;Lorg/hisp/dhis/lib/expression/spi/VariableValue;)Lkotlinx/datetime/LocalDate;
 	public static fun d2_left (Lorg/hisp/dhis/lib/expression/spi/ExpressionFunctions;Ljava/lang/String;Ljava/lang/Integer;)Ljava/lang/String;
 	public static fun d2_length (Lorg/hisp/dhis/lib/expression/spi/ExpressionFunctions;Ljava/lang/String;)I
diff --git a/build.gradle.kts b/build.gradle.kts
index 57df513..7bf746e 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -9,7 +9,7 @@ repositories {
     mavenCentral()
 }
 
-version = "1.1.11-SNAPSHOT"
+version = "1.1.12-SNAPSHOT"
 group = "org.hisp.dhis.lib.expression"
 
 if (project.hasProperty("removeSnapshotSuffix")) {
diff --git a/src/commonMain/kotlin/org/hisp/dhis/lib/expression/ast/NamedFunction.kt b/src/commonMain/kotlin/org/hisp/dhis/lib/expression/ast/NamedFunction.kt
index 4de803d..014a8e9 100644
--- a/src/commonMain/kotlin/org/hisp/dhis/lib/expression/ast/NamedFunction.kt
+++ b/src/commonMain/kotlin/org/hisp/dhis/lib/expression/ast/NamedFunction.kt
@@ -58,6 +58,7 @@ enum class NamedFunction(
     d2_extractDataMatrixValue("d2:extractDataMatrixValue", ValueType.STRING, ValueType.STRING, ValueType.STRING),
     d2_floor("d2:floor", ValueType.NUMBER, ValueType.NUMBER),
     d2_hasUserRole("d2:hasUserRole", ValueType.BOOLEAN, ValueType.STRING),
+    d2_inUserGroup("d2:inUserGroup", ValueType.BOOLEAN, ValueType.STRING),
     d2_hasValue("d2:hasValue", ValueType.BOOLEAN, ValueType.MIXED),
     d2_inOrgUnitGroup("d2:inOrgUnitGroup", ValueType.BOOLEAN, ValueType.STRING),
     d2_lastEventDate("d2:lastEventDate", ValueType.DATE, ValueType.STRING),
diff --git a/src/commonMain/kotlin/org/hisp/dhis/lib/expression/eval/Calculator.kt b/src/commonMain/kotlin/org/hisp/dhis/lib/expression/eval/Calculator.kt
index cd682c0..d5494cd 100644
--- a/src/commonMain/kotlin/org/hisp/dhis/lib/expression/eval/Calculator.kt
+++ b/src/commonMain/kotlin/org/hisp/dhis/lib/expression/eval/Calculator.kt
@@ -92,7 +92,10 @@ internal class Calculator(
             NamedFunction.d2_floor -> functions.d2_floor(evalToNumber(fn.child(0)))
             NamedFunction.d2_hasUserRole -> functions.d2_hasUserRole(
                 evalToString(fn.child(0)),
-                data.supplementaryValues["USER"])
+                data.supplementaryValues["USER_ROLES"])
+            NamedFunction.d2_inUserGroup -> functions.d2_inUserGroup(
+                evalToString(fn.child(0)),
+                data.supplementaryValues["USER_GROUPS"])
             NamedFunction.d2_hasValue -> try {
                 functions.d2_hasValue(evalToVar(fn.child(0)))
             } catch (e: IllegalExpressionException) {
diff --git a/src/commonMain/kotlin/org/hisp/dhis/lib/expression/spi/ExpressionFunctions.kt b/src/commonMain/kotlin/org/hisp/dhis/lib/expression/spi/ExpressionFunctions.kt
index 4fbd7d0..5fb4fa7 100644
--- a/src/commonMain/kotlin/org/hisp/dhis/lib/expression/spi/ExpressionFunctions.kt
+++ b/src/commonMain/kotlin/org/hisp/dhis/lib/expression/spi/ExpressionFunctions.kt
@@ -221,6 +221,11 @@ fun interface ExpressionFunctions {
         return roles.contains(role)
     }
 
+    fun d2_inUserGroup(userGroup: String?, userGroups: List<String?>?): Boolean {
+        if (userGroups == null) throw IllegalExpressionException("Supplementary data for user needs to be provided")
+        return userGroups.contains(userGroup)
+    }
+
     fun d2_hasValue(value: VariableValue?): Boolean {
         return value?.value != null
     }
diff --git a/src/commonMain/kotlin/org/hisp/dhis/lib/expression/syntax/ExpressionGrammar.kt b/src/commonMain/kotlin/org/hisp/dhis/lib/expression/syntax/ExpressionGrammar.kt
index 9d1e348..77206ac 100644
--- a/src/commonMain/kotlin/org/hisp/dhis/lib/expression/syntax/ExpressionGrammar.kt
+++ b/src/commonMain/kotlin/org/hisp/dhis/lib/expression/syntax/ExpressionGrammar.kt
@@ -116,6 +116,7 @@ object ExpressionGrammar {
         fn(NamedFunction.d2_extractDataMatrixValue, expr, expr),
         fn(NamedFunction.d2_floor, expr),
         fn(NamedFunction.d2_hasUserRole, expr),
+        fn(NamedFunction.d2_inUserGroup, expr),
         fn(NamedFunction.d2_inOrgUnitGroup, expr),
         fn(NamedFunction.d2_lastEventDate, expr),
         fn(NamedFunction.d2_left, expr, expr),
diff --git a/src/commonTest/kotlin/org/hisp/dhis/lib/expression/function/HasUserRoleTest.kt b/src/commonTest/kotlin/org/hisp/dhis/lib/expression/function/HasUserRoleTest.kt
index e894c3e..c9ae64b 100644
--- a/src/commonTest/kotlin/org/hisp/dhis/lib/expression/function/HasUserRoleTest.kt
+++ b/src/commonTest/kotlin/org/hisp/dhis/lib/expression/function/HasUserRoleTest.kt
@@ -15,7 +15,7 @@ internal class HasUserRoleTest {
 
     @Test
     fun testHasUserRole_Null() {
-        assertFalse(evaluate("d2:hasUserRole(null)", mapOf("USER" to listOf("admin"))))
+        assertFalse(evaluate("d2:hasUserRole(null)", mapOf("USER_ROLES" to listOf("admin"))))
     }
 
     @Test
@@ -26,9 +26,9 @@ internal class HasUserRoleTest {
 
     @Test
     fun testHasUserRole() {
-        assertTrue(evaluate("d2:hasUserRole(\"admin\")", mapOf("USER" to listOf("admin"))))
-        assertFalse(evaluate("d2:hasUserRole(\"admin\")", mapOf("USER" to listOf("guest"))))
-        assertTrue(evaluate("d2:hasUserRole(\"admin\")", mapOf("USER" to listOf("foo","admin"))))
+        assertTrue(evaluate("d2:hasUserRole(\"admin\")", mapOf("USER_ROLES" to listOf("admin"))))
+        assertFalse(evaluate("d2:hasUserRole(\"admin\")", mapOf("USER_ROLES" to listOf("guest"))))
+        assertTrue(evaluate("d2:hasUserRole(\"admin\")", mapOf("USER_ROLES" to listOf("foo","admin"))))
     }
 
     private fun evaluate(expression: String, supplementaryValues: Map<String, List<String>>): Boolean {
diff --git a/src/commonTest/kotlin/org/hisp/dhis/lib/expression/function/InUserGroupTest.kt b/src/commonTest/kotlin/org/hisp/dhis/lib/expression/function/InUserGroupTest.kt
new file mode 100644
index 0000000..87275aa
--- /dev/null
+++ b/src/commonTest/kotlin/org/hisp/dhis/lib/expression/function/InUserGroupTest.kt
@@ -0,0 +1,37 @@
+package org.hisp.dhis.lib.expression.function
+
+import org.hisp.dhis.lib.expression.Expression
+import org.hisp.dhis.lib.expression.ExpressionMode
+import org.hisp.dhis.lib.expression.spi.ExpressionData
+import org.hisp.dhis.lib.expression.spi.IllegalExpressionException
+import kotlin.test.*
+
+/**
+ * Test of the `d2:inUserGroup` function.
+ *
+ * @author Zubair Asghar
+ */
+internal class InUserGroupTest {
+
+    @Test
+    fun testInUserGroup_Null() {
+        assertFalse(evaluate("d2:inUserGroup(null)", mapOf("USER_GROUPS" to listOf("uidusgroup0"))))
+    }
+
+    @Test
+    fun testInUserGroup_NoData() {
+        val ex = assertFailsWith(IllegalExpressionException::class) { evaluate("d2:inUserGroup(\"uidougroup1\")", mapOf()) }
+        assertEquals("Supplementary data for user needs to be provided", ex.message)
+    }
+
+    @Test
+    fun testInUserGroup() {
+        assertTrue(evaluate("d2:inUserGroup(\"uidusgroup0\")", mapOf("USER_GROUPS" to listOf("uidusgroup0"))))
+        assertFalse(evaluate("d2:inUserGroup(\"uidusgroup0\")", mapOf("USER_GROUPS" to listOf("uidusgroup1"))))
+    }
+
+    private fun evaluate(expression: String, supplementaryValues: Map<String, List<String>>): Boolean {
+        val data: ExpressionData = ExpressionData().copy(supplementaryValues = supplementaryValues)
+        return Expression(expression, ExpressionMode.RULE_ENGINE_ACTION).evaluate( { _: String -> null }, data) as Boolean
+    }
+}
\ No newline at end of file