Purposing doing temp ip ban for people who constantly log in?

[Silverbane]

Does SE have some sort of kick feature that prevents multiple people on same router from all logging in to save server space?

There are three people playing FFXIV here at my house, and we are on together quite a lot. We've never been kicked because of it.
We all have different accounts of course.

We did get DC'd once this weekend, all of us at the same time while we were in a new dungeon together. But just once.