Hi Kary -
There's nothing at the report level that references security, but as an Enterprise installation you might be able to set something up - I'm not positive, but I know we can lock down the Administrative Report Group by Security Group.
It might be possible to define a new Security Entity, put your reports in a Report Group tied to that Security Entity, then lock them down by Security Group. But that means modifying security groups all over the place, not sure if that's a good solution. I'll check around and see what I can find out.
