Source : Free On-Line Dictionary of Computing

real user
     
        1. A commercial user.  One who is paying *real* money for his
        computer usage.
     
        2. A non-hacker.  Someone using the system for an explicit
        purpose (a research project, a course, etc.)  other than pure
        exploration.  See {user}.  Hackers who are also students may
        also be real users.  "I need this fixed so I can do a problem
        set.  I'm not complaining out of randomness, but as a real
        user."  See also {luser}.
     
        [{Jargon File}]