Looking at the readme for Novell Client 4.91 Post-SP5 Login Files 9 here:

NOVELL: Downloads - Novell Client 4.91 Post-SP5 Login Files 9

Under "New Fixes included in this release" It says this:

DLU Policy Filters not working for ZENworks 10.3. (Bug 603318)

Is there a TID about this issue that explains the problem in detail?

Thomas