Show product only to specific customer id (NOT user role, group or category)

**What I need** An example what I want explains it clearly I have a webshop with 110 products. 100 Product are for all visitors 2 Products only for customer-id 851 2 Products only for customer-id 852 2 Products only for customer-id 853 2 Products only for customer-id 854, 855, 856 2 Products only for customer-id 854, 857, 858 Customer-id 851 can see 102 products and can find his 2 specific product when he searches or see those 2 products on the category page (if the product is tagged to that category). Customer-id 700 can see 100 products. He won't find any of the other 10 products in the search results or in a category. **How to use (as admin)** On the product page (backend) I want a small option box where I can input the customer id's. Only the entered id's can find and see that product. If I leave the input box empty all visitors can see the product. When multiple customer-id are allowed to view the page: '854, 857, 858'. See attached email with a sketch of what I expect. **Important 1** There are already plugin's where you can include specific products to certain 'user roles', 'groups' or 'category'. Those plugin do not offer what I want. **Important 2** Only bid on this project if you have experience with woocommerce/wordpress and programming.