Dynamic Row level security for embedded report in Salesforce

I am trying to apply Row level security for an embedded report which is embedded in salesforce application/server. 

I know how we can do dynamic RLS for a report published in usual workspace using userprinciple() ... 
dont know how to approach this scenario. is this even possible currently? anyhow who has done this previously or know the direction we should head to for this scenario?

Thank you and much appreciate your thoughts on this