# File lib/rbot/auth.rb, line 164
    def matchingUser( mask )
      currentUser = nil
      currentLevel = 0
      @users.each { |user, data| # TODO Will get easier if YPaths are used...
        if data.level > currentLevel
          data.hostmasks.each { |hostmask|
            if Irc.netmaskmatch( hostmask, mask )
              currentUser = user
              currentLevel = data.level
            end
          }
        end
      }
      currentUser
    end