Hi,
There is no user interface for this in the User Role Editor. You may restrict access for posting to the list of categories this way
http://shinephp.com/block-posting-to-selected-categories/
P.S. My apologies for the delay with answer. I did not get automatic notification email about this post for some reason. You may email directly to [email protected] in case your question was not answered in 24 hours.
