Child Group Categories update/University Registration?

I saw a forum topic on this last year saying you might get this in the next edition. Any update on the possibility of this?

If not... could use some advice. I have 3 user types of my 5 that need the ability to choose what university they are attending. It has to be more then just me adding that custom field in each one (as each one would be separate and I need ONE unifying field) since on other components I need to filter results (i.e. Cobalt records) by what school they belong to.

Any ideas from anyone? Im trying to get it work much like behance does for filter of universities etc.

Thanks!