Not sure if you want to list ALL users of that level, or only if they have info set.

This lists all N level users if they have userlist info.
Code:
listusers {
  var %level = $$1, %uz = 1
  ; ^^ use /var to make local variables [color:green]/help local variables[/color]
  echo -ag -
  echo -ag *** Beginning of List: User level %level
  ; find all users of that level
  while $ulist(*,%level,%uz) {
    var %a = $ifmatch
    ; check for .info and display if it is there.
    if $ulist(%a,%level,1).info { echo -ag * %uz $+ : $ifmatch ( $+ %a $+ ) }
    inc %uz
  } 
  echo -ag *** End of List: Users level %level
  echo -ag -
}