Applying row-level security to crystal report instance

Hi

we have created crystal reports based on sap r/3 data using open sql driver and imposed row level security and published to BOE.The user when opens report with view on demand can see the data which he is supposed to see.

Is it possible to schedule a single instance of the crystal report and then all the users access the instance and see the data that they are supposed to see.If not what is the other way out.

Thanks in advance.

Kamal