Please upgrade to 2.3 here.
The 2.2 and earlier branches are no longer being updated.
Separate permissions for "New Discussion" or "Comment"
This discussion is related to the Anonymouse
Should it be good if we can have Guests a permission for only Comment (view and add comment) not start a new Discussion.
Right now, if I give them a permission to view category. They can also Start a New Discussion and even for some View-Only-Category, Guests still can post a comment which any other roles can't.