Analytics Software

I am trying to setup row level security when a user logs into BI Answers. Basically I want the user to create any report that they would like but only see the data that they are associated to being retrieved in the Answer Report results. I have users stored in an Oracle authentication table where they have multiple values for schools that they can view. I have data in my RPD file that contain tables with multiple rows for schools. What I would like is to capture the associated school values for the user logged into BI Answers and place a filter on the data being retrieved in the RPD file to only show rows for the user's associated schools. Can I add a WHERE clause on the Business Model and Mapping layer of the RPD that would retrieve the multiple associated schools in my authentication table and filter/match them (IN clause maybe) to the school values in the RPD data being retrieved?

Thank you in advance for any information you my have to help me along,

Kyle