Cross-IP ban?

Banning chat user ID I67S-5b53a01a7bdecbd44adc appears to also ban another user: ZC2R-f25c2d7e4e53b3df2c5d.

My current theory is that the ban ID alone isn't the full mechanism — even though the IDs appear unique, the system might be applying a broader upstream or shared network block. Could this be related to both users using the same VPN provider or exit node?

Can anyone confirm if bans affect more than just the specific ID?