Show handouts to "Currently defined party"

I run games for organised play, meaning I run the same game many times for different groups. When I have shared handouts like maps, info and rewards, I need to remember to take away the access for everyone to see it again, before the next group comes in.  Would it be possible to have an option to "Show to currently defined party"? This way the current players will have access, but a player in the next group will not see the handout if the join the game before I have tidied. This may also be relevant for long term campaigns with a rotation of players, where only players that were present in certain sessions will get access to the information gathered there. It is of course possible to give only the current players access to the handout one by one, but that takes a lot more work than clicking the "Show to players"-button.

+1, not for commercial use for completely different groups (although I can see the value there), but because it would be a way to share handouts if the party was split and I only wanted some of the online players to see the info.

Hey SImira! Post this request in the Mod Scripts forum so it can be more easily found by others. I have a script for you, but don't want to put it in a suggestion thread.