How can I block a player on the IGS server?

How can I block a player on the IGS server? - Two Men Playing Volleyball Near Red Canopy

How can I block a player on the Internet Go Server (IGS) server? It probably works the same on chess servers. None of the commands seem to block players:

README         decline        info       rating     stored
Summary        defs       kibitz         ratingstats    teach
addresschange  delete         komi       refresh        team
addtime        done       language       regchange      tell
adjourn        entry          last       reghistory     tgmatch
admin          erase          load       register       time
alias          etiquette      look       RegMessage     title
all        exit       mail       request        tmatch
automatch      FAQ        match      reset      TOC
ayt        find       message        resign     toggle
beep           free       moves      results        tokens
best           freegame       notify         save       trail
bet        ftp        observe        say        translate
byoyomi        games          pass       score      underrated
CC         go         password       sealed     undo
channel        goboard        players        sgf        unobserve
chars          goematch       pmatch         sgfviewing     uptime
chatter        gteach         probability    shogi      usage
chinesechess   handicap       progame        shogirules     user
choice         help       psmail         shogirules1    watching
client         igs        quit       shout      who
commands       IGStitles      rank       stats      yell
coords         index          ranksupport    status





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How To Block Users To Use Specific Programs Using Group Policy Windows10




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