I require a plugin that allows you to input lets say a command where groupA can attack groupB but groupB can not attack people that are also in GroupB and vise versa My guess is the permission could be (in groupA's permission nodes) grouppvp.AgroupB grouppvp.SgroupA The first one has an A saying they can attack group B The second one is saying S so they are safe from attacks from players in group A
Kinna easy to find this plugin, but it's ok http://forums.bukkit.org/threads/fu...s-between-groups-and-their-members-677.11133/ nJoy!