WODisplayGroups and D2W-Rules

Hi all

I have a D2W application in which i want to query a list of  
employees. With the querypage component of the d2w framework i can  
set some qualifiers and their values. But my application needs some  
more qualifiers which can't be set by the user. So I thought that it  
is possible to realise this with the Rule's. But I did't find out a  
soloution yet.

Is it possible to set a fetchSpecification from the Model with the  
D2W-Rules? And how can I the qualifierValues then? Or how can I  
access to the displayGroup of the page? How else can I set my  
qualifierd fetch? Do I realy have to make for each "special fetch" a  
new component, where I can set my specializd fetchSpecification?

any answer would make me happy
Roman