Can we limit the Item list in a Purchase Requistion to a particular Inventory Organization?

We have a requirement to limit the selection of an item on a purchase requisition to a particular inventory organization. Can this be achieved?  We have a particular responsibility that needs to create PRs but we cannot allow them to view Items from other organizations. 

Ideally we would like to limit the Organization field on the bottom to the same org as well, but this is less important.