Potentially, yes. We'd also need to modify user permssions in the Ubuntu server.
The server will host a number of sites for different customers. So if the server is "example.com", then customer1's site will be at "example.com/customer1", customer2's site will be at "example.com/customer2"
In the case of this client, this setup is preferable to having a subdomain for each customer ("customer1.example.com", "customer2.example.com")