Lenovo AnyComm won't offer you the possibility to trace an IP address. Once a user changes his name, the request is sent to the server not to your computer. This means, it's practically impossibility to trace the IPs of the user who change their names. The software might as a client, while the server is the one set up by Lenovo.
However, to see the network connections established on your computer, download and use TCPView.