Is there any way to restrict access to media library files? I want them restricted to user group the same way I can do with a node.

There are several user levels on the web site I am building and each need to have access to a different set of flash movie files.

I am guessing it could be done with some kind of redirect page that check user group before loading the actual file. But I'm not sure how to go about implementing this.

Any help or pointers in the right direction would be appriciated.

Thanks.