aah lol i missunderstood your problem a bit. but i really DO have the solution to your problem. in my game there are 4joysticks and 4players and they can be used all at the same time so 4 fingers are touching the screen and the every joystick responds to the appropriate touch input.
how i did this:
i made a invisible layer at the top called "subdivision". in that layer i devided the screen into 4 rectangles called "tracker1" ,2,3 and 4.
now i have global variables calld touchID_player1,2,3 and 4 and an event like touch is overlapping tracker1 -> store touchID in variable touchID_player1.
i can send you a capx. as soon as i get on my desktop computer if you want to.
ps: maybie ill make a tutorial on that in near future.