I got Essentials and i dont know how to make it do [Owner] (for more) And [Moderator] and [Admin] For others.
You can download a plugin called Prefixer that allows you to give custom tags to certain players. You have to disable EssentialsChat.jar for this to work though. http://forums.bukkit.org/threads/ch...s-prefixes-to-users-when-they-chat-1060.4945/
If you also have essentialsGroupManager you can define a prefix for each group. In this guide I wrote you can find more information: http://forums.bukkit.org/threads/bukkit-guide-permissions.50305/ zip