I have a Wordpress site of a tennisclub, who's content is supposed to be managed by members of several committee's (such as the youth-committee, the maintenance committee, the activities committee and so on). Mostly the site will consist of permanent pages with info on or from a certain committee.

What I want help with is to make distinctions between pages for each committee (using categories???) and to assign editing rights to members of a certain committee. Which means they can only edit pages from their assigned category.

Also, I want to keep members of choosing a category each time they create a post. I want the site to automatically add a default category based on the user role once that user creates a new post. Alternatively to keep them from choosing any category but their own when posting.

What plugings should I use and how would they have to be set up?