Currently Python and Go servers support multiple users.
You can use different passwords on different ports like this:
{
"server": "0.0.0.0",
"port_password": {
"8381": "foobar1",
"8382": "foobar2",
"8383": "foobar3",
"8384": "foobar4"
},
"timeout": 300,
"method": "aes-256-cfb"
}
If you want to build a user management system, check the Manager API.