http://bugs.winehq.org/show_bug.cgi?id=20744
--- Comment #4 from Austin English austinenglish@gmail.com 2009-11-18 13:18:18 --- (In reply to comment #1)
You can add keywords at the time you open a new bug report.
I believe that only applies to people with bugzilla editing privileges, otherwise you have to wait until the bug is filed, then you can add new keywords (for your own bugs, of course).