Seperate Categories or Products for Local Delivery or Shipping

If anyone can help I would appreciate the info or direct me to where I can get the information I need.

I am managing a zen cart 1.39f soon to be upgraded to 1.39h for a client that is a Personal Chef. They are looking to restrict shipping for perishables products to local zones (this I am using a local delivery mod with zip codes set for the delivery zones they service) but if there is a customer outside of local delivery that wishes to purchase non-perishables products (equipment, knives, cutting boards, ect) they would be able to use standard shipping modules.

Question how would I go about separating the products or categories to allow shipping versus local delivery?

You could add a new field to the products table such as:
products_local_only

and use that to test the content of the cart to see if 1 or more products is only for local delivery ...

If that is the case, then you can use that to alert the customer on the shopping_cart page as well in the checkout to explain why they cannot check out based on shipping address ...