This update brings bungeecord support.
The memberlist and who's online can be tracked using bungeecord.
Simply upload the same jar to bungeecord and configurate the key and domain.
Restart your bungeecord and all spigot servers (running the same plugin)
and it will do its job.

Basically all member lists and Live online are send by bungeecord then the spigot plugin will stop sending member lists and live online.

This way you can show your Network online players and network total joined members instead of single spigot server

Thanks to jaysmethers for the idea!