[TYPO3-english] b/e extension for viewing/sorting/filtering fe users

[Simon Browning]

Does anyone know of a back end tool to help manage/view front end users.

For example with a filter that would let a b/e user view all of the f/e 
users in a particular group.

One of our clients has a site with about 15K f/e users and needs a nice 
way to view all of the users who are in particular groups.

Thank you

Simon