Is there any way to use iOS Remote to control an Apple TV without Home Sharing? This is an office environment and while we all have iPhones and would like to use Remote with the Apple TV we don't want to all use the same Home Sharing account to do so.
You can't (yet)
Currently, the official Apple page:



Doesn't make any indication of how to do this. Neither does a quick Google search.
But...
This Monday (June 10), Apple is expected to unveil iOS 7. There might be some changes there that accomplish what you want!