Autocreate search based on Inventory PO and Non Inventory Purchase Requisition

Hello,

We want to restrict buyer to create PO via Autocreate workbench based on inventory and non inventory purchase requisition.  As per currently functionality, buyer can search for all approved PR and can create PO.  We want to have separate group of buyers for Non Inv PO and Inv PO. 

I know we can assign category at buyer level but one buyer should be able to create PO for multiple category.

Thanks.