Is it possible to send Radius accounting info to two different servers Cisco WLC?

I am trying to figure out a way to send Radius info from my Cisco 8500 WLC to two different accounting servers. One is the NAC the other is the content filter.

I found This article that describes how to setup aaa broadcast server groups but it only applies to 5700 series WLC. Anyone know if this is possible with a 8500 WLC?