On a Velocity server (use a different plugin for BungeeCord), you can set the number of accounts that can be connected per IP address and provide a bypass option.
Code (Text):
ip-limit: 2
kick-message:
- "<red>You cannot connect to the server."
- "<red>A maximum of two accounts can connect per IP."
- ""
- "<yellow>For more details, please contact us on Discord."
- ""
Installation:
- Put it in your Velocity plugins folder and restart your proxy.
Do you want to remove the IP limit restriction?
- Please grant the permission
"velocityaltlimiter.bypass"
- You will need a plugin like LuckPermsVelocity.