We're coming from a CMS which is built around a group hierarchy which determine's security, roles, membership, and where users sit in their organisation's structure.
So if a sub site is a school then groups are set up for classes, each having a teacher as group admin.
Is there an equivalent in Wordpress Multisite that could assign people to groups or classes in schools/teams? The groups may have their own shared assets (e.g. docs) and the teacher would be able to see lists of class members.
And I guess not confusing with BuddyPress's groups as they're only available from the single BP site on the network. [Though I have seen the BP Multi Network stuff but looks to be incompatible with most of the WPMUdev stuff like Pro Sites]
Any ideas, have I overlooked something really obvious here?