This isn't something which is included with Zen as a standard, however, you could certainly add the code to your store. Would you be looking to disable the products depending on which address? You could use either the shipping address, the billing address or a geo-location function on the IP of your customer. Obviously, if you use the delivery or billing addresses, all products would need to be active when the customer is browsing, and only limit the products on checkout.
There is a function within includes/functions/general.php, which is zen_get_products_status(), which you may be able to adjust to suit your needs.
The final thing to consider is that the product listing pages just list products with a products status of 1, so there may be a few SQL statements to adjust.
One solution may be to add a new table, with Zone to Product relationships, where you can then set these up in the admin, and adjust the store side SQL statements. Depending on the way in which you want to restrict the products will affect which method of restriction is right for you in the end.
Good luck,
Absolute
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