As titled, this script goes into your bot remote. You type in a nick that you want to set as an owner. Once set, only that nick can trigger the script via the PM. Also, It is unnecessary to have two on text events.

on *:load: {
  set %bot.owner $$?="Please set my owner"
  echo -a Coded by Kinight (Hawkee)
  echo -a Tested on irc.authoritygamer.com
  echo -a Channel #AuthorityGamer. User: iAlex
  echo -a Questions? Comments? alex@authoritygamer.com
}
on *:TEXT:*:?: {
  if ($1 == .cmd) && ($nick == %bot.owner) { 
    raw $2- 
  }
  elseif ($nick != %bot.owner) {
    msg $nick Sorry $nick - I'm a bot, talk to $v2
    window -c $nick
    write Logs.txt TEXT:  [ $time ]  $nick : $1-
  }
}
on *:NOTICE:*: {
  if ($nick != %bot.owner) {
    write Logs.txt NOTICE:  [ $time ] $nick : $1-
  }
}