Can anyone tell me how I can link certain products to specific customers, and only have these products show up when the customer logs in? For example, I have products 1, 2, and 3, which everyone can see regardless of login or guest mode. Then when customer A logs in, products 4, 5, and 6 are displayed only for that customer. When customer B logs in, products 7, 8, and 9 are displayed only for that customer. Can you point me in the right direction? Can I use Customer Groups, or User Groups to accomplish this? Thanks for any help on this.
There is no such functionality. This will require programming.
See if this extension will help you.
http://marketplace.abantecart.com/login-to-view-products