@pippinwilliamson understood.
Also – my first comment on Page Security is wrong – you can bulk add users to a group in the All Users screen. So far it is doing the job OK.
Page Security by Contexture works fine. It has some limitations
1. You have to add users one by one to groups by typing their names. Some other solutions in other plugins include listing all the current users and just clicking / checking ‘add’ eg BuddyPress Group management
2. It would be better if it allowed you to use BuddyPress groups as groups to choose from.
Content Restriction looks like a very comprehensive plugin. And I don’t mind the optional extra of paid support. Problem is
a. it is built around restricting access to downloads rather than pages/forums/categories etc
b. it is built around the idea that the user has or hasn’t paid – if what you want is to segment users into groups who have permission or not to access certain content for reasons other than their payment status. [this coudl be members of a non profit, teachers parents and students etc). If @pippinwilliamson was minded to adapt his plug-in I am sure many many people in the non profit sector would gladly pay for his support for a few months!