Does this work with bungeecord? Such as I add this to my proxy server, and add the permissions groups in the config.yml, with the permission nodes. Would this do it globally, or not?

You'd want to enable IP forwarding in spigot.yml (Have a google around for how to use the setting).

You'll also need to enable ban syncing, see:
http://dev.bukkit.org/bukkit-plugins/maxbans/pages/ban-syncing/

And
http://dev.bukkit.org/bukkit-plugins/maxbans/pages/sync-example-config/

Okay thanks - Closed.