This is a very strange and semi isolated case.

We've been using Zenworks 7 for a while now on hundreds of machines with no problems.
We just got a batch of HP DC7800 machines in and created an image the same way we always do.
After pushing down the image, sometimes after rejoining the Domain and logging in as local administrator the NAL will show and Launch applications for the previous network account (usually the one that last used or setup the machine)
So basically I can log in with workstation only and as local administrator and launch GroupWise and it will launch it as a network user.

Deleting all the profiles on the machine do not fix this issue.