Prevent Analysts and End users modifying Filters on queries

Hi

I want to be able to limit searches done to a date and company. The search below works perfectly but then from the analyst screen they can right click and remove the 2nd & 3rd filter if they want to and search for items that would have been restricted by them.

I can't hide the filters as several of them are prompts and need to be available.

Are there any privilidges I can deny for the role?

Thanks

Rachael