Summary: 

To have a user only able to view or be assigned to a particular warehouse in the account. 

Steps:

1. Navigate to Settings

2. Click on System

3. Click on Warehouses
4. Select the Warehouse of your choice 
5. On your left-hand side, under User Access, you can toggle the user access to the specific warehouse.

Additional Information:

This process can be repeated to allow a user to multiple warehouses: