Until such a time as user list searching and filtering is implemented, and honestly it's probably very low on the list, you can always go to the Users list and search it with your browser's built in Find function. For all major Windows version browsers the shortcut for this is ctrl + F. It'll bring up a text box (on the bottom for Firefox, at the top for Chrome, no idea for IE and others), just type in the word/name you're looking for and it'll search the page for that word/name and show you any instances of it, and the arrows by the text box will allow you to jump to the next instance (if there's more than one) of that word/name being used on that page.

Until pages get implemented in the Users list, this will basically act the same way as a traditional user search function, so it should work for you guys well enough until such traditional searching is added.