Need assistance,guidance with Dynamic RLS

Hi ,

I need some guidance with Dynamic RLS.

Attaching the sample pbix file

https://github.com/suvechha/samplepbi/blob/main/sample_info%20-%20security.pbix

Sharing the sample data model.

The security of this model should be.

Userid 9 should only view the projectid assign to the user i.e 1 and 5

Userid 7 should only view the projectid assign to the user i.e 1

Table                                              Column

Projects                                          Project_id

Core_UserProject                            userid,Project_id

CostItem                                         Project_id,cost_item_id   
All other tables                                cost_item_id 

Thanks