Ok, I feel a bit stupid now. The problem was following:
I had an "Any" condition in the Tasksequence Options, but after entering several WMI Queries I klicked move up. Since the conditions went top up, but did not jump into the Any condition itself I thought, It already is under the Any condition. By chance I copied the WMI Query and pasted the Query right under the Any Condition and the Query was positioned different than the other queries. So i realized, the behaviour of the move up and move down button is different in tasksequence options than to objects in the tasksequence itself. I wish it was programmed better. I lost some hours because of that and I already started to doubt WMI, etc.
After correction is was running as expected.
Regards, Jonas