Hi ntozier, thanks for replying.
Topic A could be used by either site, and the site determines which department it routes to.
So, it's the same question, being asked by one of two sites. If site 1 asks, then it needs to be answered by department 1, but if site 2 asks then it needs to be sent to department 2 to answer....
Does that clarify at all?
If I put it in the help topic to route to a specific department, it can only route to one of them and won't know to send it to the other if the site is different.