I can inform you that I got the question to my second problem.
The SetHealth works like a charm. I still need to get rid of the first problem though. (getting players hp by going through a port, but only one time)
What i basicly need is a trigger_multiple that works like a trigger_once for every individual player. And i don't really know how to do so. Maybe I could use something like a filter_player_name and make every single player get a targetname or something? I just don't know for sure how to do that...

