Kevin Schroeder has a new post to his his blog with a bit more advanced example of using the Zend Framework 2 EventManager to make global event triggers.

If you look at my previous post on the ZF2 EventManager class you might be tempted to think that you are limited only to listening to events for local instances of the event manager. But no, my friend, you would be wrong. The event manager actually provides access to a sort of global event manager. But it’s more than that. This global event manager allows you to listen in on events for various targets.

He includes an example of how to use the EventManager in a specific namespace that's triggered based on a custom event. He attaches a custom class, "cls2", to a listener on his "ns1/cls1" class.