The user has a possibility to create a price list for a specific product or product group, for a specific customer or customer group. There may be an indefinite number of them.
As a rule, the price list contains a list of goods for which new prices have been set. If this setting is enabled, then only those products from the first price list with the corresponding prices will be available for selling in this POS.
First of all, create a price list. Here you can find a guide.
Assign this price list to the location. Guide is available here. Note: the price list should be added into the Price List 1 field!
Navigate to the POS and enable the setting in Settings -> Configuration -> Sale -> Allow selling only from price list 1.
Save configuration.
As a result users will be able to see only products that are in the price list configured for this particular location in the Back Office.