If I understand correctly right now I can search the forum members by name only.
But I quite often find myself browsing through the whole list of forum members to figure out some statistics and I think that it would be helpful if some filtering could be implemented as a feature.
1) I sometimes check if there are forum members who haven't posted a single post. I delete them.
There IS an automatic (schedulable) option to delete users who haven't done any post, but I can't use it because I do have some guest posters for blog who are not contributing to forum and since they are in the same database I cannot distinguish between them.
So, it would be helpful to have a tool that shows the users who haven't done any post.
2) In order to see how active the forum is, I sometimes check how many members have visited during the last 5-7 days. Obviously, the older is the forum the less relevant is the figure of “there are xxx members” because over a period of time many people come, register, posts in few topics and never come back.
SO it would be helpful to have a filtering for “recently active” members.

just covering ourselves in case users end up deleting users they didnt want to