Internet Direct (Indy) Version 9.0.1 Beta
TIdRSH.ClientUserName
This property is the user's current name on their machine.

property ClientUserName: String;
Description
This property is the user's current name on their machine that will be sent to the RSH Deamon for authentication along with the TIdRSH.HostUserName whenever the TIdRSH.Execute method is called. For Windows RSH Clients, this is usually set with the value obtained with the GetUserName Win32 API function.