Is there a way to modify the members list module to sort by forum user groups?

What I mean is that I have members who belong to different areas of the forum for example, Americas Army, BF2, Tiger Woods 2006 etc... I moderate what the members can see via user groups. However it would be nice if when viewing the site members you could sort by groups so you could see who plays what games and if no one is in any groups then they must just be a member of the site.

Does anyone know or have suggestions on how to do this?

Thanks,

Luke