Take Device out of Recording Pool

Not sure how to best explain this. What I'm trying to do is prevent the box in my kids room from automatically changing the channel for an upcoming recording.

I understand that DVR recordings happen on different boxes, as you can sort your DVR recordings by the device it was recorded on. What I would like to do is exclude a specific box from being part of that pool. I want to record my shows, but I don't want those shows to display/record on my kids TV.  Any idea's?