Restrict the list of item or supplier on PR based on user creating the PR

Content

Hi All,

Requirement: - 
We have a business requirement that they  want to restrict the list of item or supplier while creating Purchase Requisition based on user creating the Requisition.

Example: - 
Items: - A1, A2, A3, B1, B2, B3
Supplier: - S1, S2
User: -U1, U2 

Case: - 
Case 01 - When user U1 creates the PR, he should see only A1, A2, A3 items on the item LOV / Item search result.
Case 02: - When user U2 creates the PR, he should see only B1, B2, B3 items on the item LOV / Item search result.
Case 03: - When user U1 creates the PR, he should see only S1 supplier.