Organization Reporting with Exceptions

Hi,

Please help as how the scenario can be captured in the system.

X-------->Y-------->Z,consider these three as organizational units.X is the root Org Unit,Y is the Sub org unit of X and Z is the Sub Org Unit of Y.Now is it possible that employee in Z reports to X head directly and approval are handled by X head only, skipping Y head.

Pls guide me

Regards