P2 theme – Groups access

Hi,

I am using P2 theme and I need to create different group of user that represents geographical regions. Users can only read and write posts for the respective region. How could I achieve that?

The problem is that I already installed multiple plugins (User Access Manager and Role Scoper) to manage user/groups access but I have no idea how to use them.

Does anyone has done something similar and could help me ?

Thanks in advance !