Selective Sharing iPhoto Library over AirPlay?

I've spent sometime searching around on this issue and I can't seem to find much about it.

I'm concerned about iPhoto's sharing facility, I have two Apple TVs in the house and one of them I don't want to give access to my entire iPhoto library. I've looked at sharing options on iPhoto and even played with the option of adding a password but still my entire library is open to all over AirPlay.

Has anyone else noticed this and had any success in limiting their iPhoto Library at all? At the moment I have just removed the various photo collections out of iPhoto altogether to stop this but I'm not happy with doing it. Seems like an obvious feature to have left out or am I just not looking in the right place?

I'm running iPhoto '11 Version 9.1.2 and both Apple TVs are 2nd gens.

Any help would be appreciated.