I would like create a group of users (say group A) that will be able to talk to only another group of users (say group B). Group A can only talk to group B. B can talk to anyone and if a user is not a member of one of these groups, he can talk to anyone too.
The user in group A cannot change this configuration by himself. So, it cannot be justs a simple subscribe thing. They cannot join a conference room too.
Is it a thing I can do with Wildfire ?