I'm in the planning stages for a very different usage of WP Multisite and trying to get my head around some kind of strategy to restrict my sub-blog users to only a specific set of categories for their posts. We're setting up the users with their blogs on a one by one basis and they will use only one theme. They have three basic types of posts they can add and we want to restrict those posts to specific categories so we can promote posts on the home page of the magazine style main blog on a by category basis.
None of the users will have full admin access.
I'm trying to figure out if I should setup custom post types in a blog template that is used for every new blog setup, use Pods or something like it to create a custom write panel that hides the category from user input (in other words, a static category based on the post type).
Just trying to figure out the best approach -- any guidance would be appreciated.