Tools->Users & Access Profiles...
When you open the Users & Access Profiles... window, you will see the already defined users and groups. Users with assigned relevant Access Profile have Remote Access enabled.
Tools->Remote Sessions
In NetCrunch Remote Sessions window you can find list related to a currently connected users. You see from which IP address such user is connected and at exactly what time the user logged in.
You can disconnect any remotely connected user by using the X and Disconnect icons from the NetCrunch Remote Sessions window.
Note: The number of concurrent users that are allowed to connect remotely to NetCrunch Server is dependent on the type of Remote Access License you have purchased.