power pivot can we restrict some parameters by default?

Hi

I designed power pivot in excel 2010 through  SSAS cube and deployed to sharepoint. There is multivalue option   in filter e.g Bill type--all-C-M-O-R where user can select all or any of them or NONE OF THEM. I need to design in such a way the end user can not  do non select at any time.....

Any trick?