Use feature attribute to create layer when importing

I have a dataset, NJ Municipalities, (500+ records)

When importing I would like to have the municipalities shape go to a level based on an attribute, either predefined in the DGN or have it create the layer based on the attribute 

In the screen shot below I have a township called "Aberdeen", upon imploring i would like it to go to a level based on the GNIS_NAME column, in this case it should go to a level called "Township of Aberdeen"

I came across a similar thread here but trying to implement Inga's solution it was too broad, putting all items matching the criteria to a singe level

It sounded like it was going to be implemented in a Bentley Map upgrade that I read about here but that was 10 years ago 

Any thoughts?

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