Web Reports user role restrictions

Is there a way to limit a Web Reports user to only see the contents of a report that is emailed them from the Web Reports scheduled activities?

In this case, I’d like to send that a report containing all of the Open actions. I’d like them to see that report, and be able to drill down (using links embedded in the report) to more granular data. I don’t want them wandering off and pulling up other reports.

Any idea as to how I would accomplish this?

Thanks,
Bob K