Report Scope on Custom Report

Hi

I have made the following custom report:

Select: a.MacAddress, b.PropertyName, b.PropertyValue, c.PropertyName, c.PropertyValue, d.PropertyName, d.PropertyValue

From: MobileDevice as a, DeviceProperty as b, DeviceProperty as c, DeviceProperty as d

Where: b.PropertyName='SerialNumber' and c.PropertyName='ModelName' and d.PropertyName='DeviceID'

How can I limit it to a device group, the same way as on a built in report.?

or even better how can I add to the report, which device groups the device is member of?