1) Select on the Listings drop down and go to Audit Listing Groups

2) Select on NEW from the top tool bar and then create the Audit listing group.  Enter the Name and Customer code

3) Once the above has been set, then go to Customers the last column here Audit List allows you to set the group for the customer.  Then select on Save

4) You can then manage Products for these Audit Lists under Listings > Product Listings

In here you can select the Products you wish to see in the Audit list group and then select the Assigned customer group. Highlighted below.