lxc-iptag is a simple script to add ip tags to LXC containers.
curl -sL https://github.com/gitsang/lxc-iptag/raw/main/install.sh | sudo bash
Open /usr/local/bin/lxc-iptag
and change the cidr_list
The default CIDRs are
cidr_list=(
192.168.0.0/16
100.64.0.0/10
10.0.0.0/8
)