Module to provide access to individual products, only certain groups of customer.
The module adds to the page Of creation/Editing of products the choice of group of customers to whom the products will be available. If you do not select more than one group for access, then the product will be available by default to all customers of the site. If the product is limited to certain customers-they will not see it on the site (the product will not be displayed), even if you click on a direct link.
This functionality can be useful for the sale of digital products or products on special offers.