There's an option "Manually approve registration if user shares IP used by a banned user in last X days". If you ban a user that has used that IP, enabling that option will require registration approval if they register again (in the next X days).
There's an option "Manually approve registration if user shares IP used by a banned user in last X days". If you ban a user that has used that IP, enabling that option will require registration approval if they register again (in the next X days).