Thank you.
So the complete rules for whether a discussion should be posted or not can be summed up as:
-
Author does not have a BBS account - discussion posted by boingboing
-
Author does have a BBS account
a) BBS username doesn’t match Wordpress username - discussion posted by boingboing
b) BBS username does match Wordpress username
i) Author is part of “authors” usergroup - discussion posted by author’s BBS account
ii) Author is not part of “authors” usergroup - discussion not posted.