Hi,
ok, it's something that is not really the job of the Photon. You will need to maintain a list or a hashtable of the relation between scenes and map, but really in that case, I would suggest that you call the scene by the name of the map, then it's easier, simply load the scene named by the map you want to load.
If you actually mean that for a given room, there can be different scenes, then I think you will need a taylored system that extends beyond what's currently available in the photon bridge we've built so far. I know for example that a room can host custom properties, that could be your way out for this feature you want to implement.
So in short, if I give you the ability to store custom information for a given room, would that help in your case?
bye,
JEan