[Plugin: Role Scoper] Auto assign category

I need to do the exact same thing. Have a user restricted to adding posts in one category only.

I also need to do this. Ideally, I’d both have a particular category per user defined or checked for them, and all other categories hidden (and I’d also by default hide the categories pane in the New Post window.

I basically want my users to have the most simple interface possible. They click publish and posts are automatically routed to a unique category I assign to each one of them.

This hides categories (and still works) but no auto selection of categories according to user: https://www.ads-software.com/extend/plugins/bind-user-to-cat/