You're right. It is there as a filter for closed work orders, but not for open ones. This is clearly a good enhancement request and I'll submit it.
In the short term, you could write a new report using the Access report writer. Also, the new version of Facility Request allows a technician to see their list of open work orders.
Mark Evans
Autodesk
Mark Evans
Senior Product Manager
AEC Division, Simulation Product Line
Autodesk, Inc.