Distinct local and remote logins at server

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http://nixcraft.com – Hello, i have found that one of my users in history output loggs in wtih tty5 console. All of the other users use the pts/0 or pts/1 to log in. Does it mean that he is loggin in locally to the phisical machine instead of remote login? How can i block local login access to the phisical machine for particular users or all of them? Thanks in advance for all of the tips. (HowTos)