Possible for 3-4 accts under same ip?

If my mom were to make a lioden account under the same IP but there are already 2 accounts under that IP how would that work I don’t wanna get banned

A mod once messaged me about having a 3rd account under the same ip before but that was because I forgot my password for my newly created alt and didn’t mind making a new one but I’m wondering now if there’s a way to have another added to the ip if it’s someone else’s

Idk if she wants a alt or not so I put 3-4 incase