A default category definition per user/group would be nice. If a user do not choose a category for his post, it should be published in his defined default category where he has permission to publish posts.

popart said:

I need the same thing.. to be able to assign a default category per user/group.

So, my default category for Authors is "News". 

But I want to set the default category for Contributor to something else.

Please contact me if this is possible with Role Scoper. Thanks.

That is a feature that I would like to add at some point. At the moment, I need to suspend volunteer on-demand development of new features. If you need the feature soon, I am available for paid consulting at a rate of $60 / hour. I estimate a development time of 2.5 to 4 hours = $150 to $240.