Internet Direct (Indy) Version 9.0.2 Beta
TIdRSH.HostUserName
This property is the user's User ID on the remote host.

property HostUserName: String;
Description
This property is the user's User ID on the remote host. It is sent along with the local user name (IdRSH.ClientUserName) for authentication when the TIdRSH.Execute method is called.