RLS design & DAX rule suggestions

[Anonymous]

Hi all,

I need help in formulating a design for implementing RLS and writing the appropriate DAX rule for the scenario where I want to enable a user to see all the data of the business unit that he belongs to. I am listing down the tables and sample below. I want to enable John Miler & Mitchel Johnson to view hours for BU1 as well as slice/filter through their teams, while Josh Hazelwood should only be able to see BU2 and his respective team. 

My question is, what sort of relationship should I establish between these two tables, and, what sort of DAX rule should I write? 

Modeluser master datatransactions data

Thanks 
Kaz