Cannot restrict item or category on purchase order creation by using content zone for procurement

Summary: Cannot restrict item or category on purchase order creation by using content zone for procurement usage

Content (please ensure you mask any confidential information):

We have a need to restrict buyers to see spesific kind of items and categories while creating purchase orders or purchase agreements under same procurement BU. We thought to use local catalogs and by having spesific local catalogs assigned to procurement usage content zones secured by worker will help on this.

We did:

1. Create local catalog ( Include items from all agreements and Exclude items from specific categories and excluded a category)
2. Create a content zone (Added excluded catalog and secured by a spesific worker)