Hi Ingo,
sorry, I didn't have much time today to look at the specifics of the filter you're trying to set.
But basically the more complexity you'd like to have in your report, the sooner you'll reach the limits of what is possible with drag&drop.
If you feel you've reached that point, your choices are:
1. Acqire decent SQL skills.
2. Define the speficis of your requirements and have the report you need custom tailored for you by our PS services.
I'd love to help you out if I can find a bit of time, so please feel free to shoot me a mail directly (I have a feeling you already have my contact details).
Thanks & regards,
Gerhard