Restrict or log printing
Coo, you're right, sorry - i was checking in the current code (soon to be 27.x), looks like it only arrived recently.
It's not even in Tiki 26, and looks like a fairly big change so not that easy to copy it into 24.x but i guess could be done for the next 26 release at least, if enough people need it - i can't think of another way to do it properly currently - you could hide the print/export links with css or javascript, and then add a custom module with the buttons in but only showing to the groups you want, but that would be fairly simple to bypass...