Licensing SQL 2014 Standard

I am presenting a quote for a customer of a SQL Server Standard for 45 "real" users (1 cal server + 45 user cal), and the company will implement the ERP is presenting the same quote with only one User CAL, because his software only uses a single user to access the DB via loacal auth.

Newbie question: Is it legal this company proposing? This software of this people can be considered to make multiplexing or pooling?

Thank you all,

Eduard