Is there a way in Gnucleus to cap upload bandwidth?

There's an over-all cap, and a way to limit message bandwidth during transfers, but I find those downloading from me can use all of my upstream bandwidth. This slows down any downloads I may have going.

What I'm looking for is a way to place a cap on upload bandwidth as a whole. Lime and BS do this nicely (Gnote limits it per connection which is kinda useless).