Web filter profiles "who"

I’m trying NethServer as a web filtering proxy and it seems to work.
I created some profiles and now I want to restrict some of them only to some clients.
In the documentation I see that profiles can be setted in the “who” configuration to a local users, group, a host, group of hosts, zone, CIDR subnet, IP range or an AD user.
But… In the “who” dropdown menu into the profile configuration I only see the green zone, and nothing else.
Where I’m wrong?
Thank you very much for your help!

The firewall module is what I needed, thank you very much!

Ehi man happy to see you here and WOW you have resolved your issue by yourself :clap: