You can do this in HyperLynx 9.0 - it will find all co-planar and area fill reference structures...
In HyperLynx 9.0, go to Setup -> Advanced Coupling Settings and check the box for "Include trace to area fill coupling" and set your thresholds appropriately
What I means isn't a threhold value. I will talk it after 9.0 formal release. Btw, this real design ca be used as a test case to show how to use Hyperlynx, covering DDRx, PI and thermal topics.