Excluding Internal Traffic in Mixpanel: Need Help!

Hello ! Happy to join the community 🙂 I would like to exclude internal trafic from mixpanel, and I can't manage to do it. It seems we can't use the IP Adress? I wanted to exclude my city, because I have the $city in the board, but when I get to users, they're not associated with a city, making my cohort pointless 😅 Thanks in advance for the help and support! 🙏