Filtering cross posts

Is it possible to filter out all cross posts? i.e. only see articles posted to the subscribed group?

gnu.emacs.gnus

Is gnu.emacs.gnus discontinued?

Re: gnu.emacs.gnus

Richmond writes: > Is gnu.emacs.gnus discontinued? I don't think so. Silence for a week just happens sometimes. -- I do not bite, I just want to play.