Preventing Excess Usage

We use the Select Quarterly Plan. We have one license we share between multiple employees. Isnt the Bentley program suppose to prevent users from using the software at the same time so we do not have excess usage? How are employees in a company supposed to know if someone else is using the software at that time? It does not seem realistic to expect employees to go around to several other employees to see if they are using it. Please let me know if I am missing something, it seems like a very basic step that would save customers a lot of money and grief.