Bugzilla: Assign bugs to multiple users?

Hi, I know there are other forums I can ask this question, but you guys are so good I figure one of you will know! Tried [google] - but found nothing about it, so I'm guessing it's probably not possible (or I'm asking the question wrong). Is it possible to assign a "bug" (issue, whatever) to more then one person at once? Right now for instance I'm working closely with someone on an issue, so really it's both our time at once. Thanks, Paul