Editing Output for 'ViewAllUsers'

Hey ya!

I have a little problem with filtering the output of the ’User-Service’ => viewAllUsers (default).
With some filters I’m using a have an empty output. THis is nothing special so far but I’m unable to format this output... I’ve tried it with using PHx but if the output is empty the outer template won’t be shown as well...
Dows anybody has an idea how to solve this problem? I would be glad if i can tell the user that there’s no user matched the given criteria.

thanks a lot!