@Carlos-Junior, you could create a script with two commands in it like this:

taskkill /f /fi "USERNAME eq %USERNAME%" /fi "WINDOWTITLE ne" shutdown /s /f /t 0

Then your command would run that script with a command like this:

c:\scripts\close_all_shutdown.bat

If you don't want to create a script, you can generally run multiple commands with one command line by separating the commands with && like this:

taskkill /f /fi "USERNAME eq %USERNAME%" /fi "WINDOWTITLE ne" && shutdown /s /f /t 0