Yes. It's a small script in the init field. But I suggest you, set the trigger not presend, but "detected by bluefor". It's much realistic!
I'm in the office, so I cannot test it to you, but the script could be something like this:
_blueforce = this select 0;
{_x setbehaviour "AWARE"} forEach _blueforce;
and name it "alarm.sqs" and put this into the init field of trigger, but you have to add a list as a parameter to this script of the blue soldiers....