That information isn’t readily available on Cloud server, however it can be accomplished. NoMachine can run custom scripts on certain events. You can create custom bash scripts, that sends info to machine where Cloud server is installed. This scripts should be set into according session events in server.cfg, for example to log information about session start you would create custom script that logs/sends session start to Cloud server machine – sessionStart.sh, than set <UserScriptAfterSessionStart /path/to/your/script/sessionStart.sh>, than create another script that logs session end and set <UserScriptAfterSessionClose /path/to/your/script/sessionClose.sh>, <UserScriptBeforeSessionFailure /path/to/your/script/sessionClose.sh>. To run custom script after login – UserScriptAfterLogin key can be used. Note that this should be done on all remote servers.