Gatekeeper Protection for swf files?

Hi ppl, does anyone here knows how to make a gatekeeper for flash files that don’t let the movie play if the file is running on a forbidden site?
Original content located in:
if another site include that example.swf, it redirects to:
I need to do that to malicious people don’t steal my bandwidth or just steal my games or any other flash content.
If anyone have an I dea how to do that, please replyC:-) .
btw my site:

we could’ve guessed that, lol :slight_smile:

The swf has a url property it can check on, so can use

if(this.url !=...){
//or use:
if(_url != "") {