MSS and BW Reporting

Hello - does any one have any experience with MSS and BW reporting?

We have a requirement to implement BW reports to Line Managers through MSS.

For R/3 Reports we have no issue as we can use the standard structural authorisation function module to restrict access to empoyees directly reporting to the manager.

How can we restrict BW reports in the same way? i.e. When Manager runs the report they should only see data about the employees that report to them in the Org structure.

We are using BW 7.0.