New role and permissions for assemblies

In order to support proposals on an assembly where due to they own rules of procedure those are only for users (members), could be interesting to: - add a new role of "member" - add a new permission (scope?) for supporting proposals just for "members". Case of use: next elections to Education Council of Barcelona city that will took place between january and april. Only members of the 10 District Education Councils must be able to support proposals for de City Education Council.