Project Diablo 2 Whitelisting
More than one connection from a single IP address will require a whitelist to avoid being flagged and suspended. This means you cant self-mule when you applied for a whitelist - it is for people that play with 2 or more Accounts on the same IP because theres a second REAL person on their IP.
Running Diablo II on multiple computers/systems still counts as multi-clienting, which is forbidden. Those caught abusing whitelist permissions will face a permanent ban.