Balance with non top-level accounts

[h-oll]

Hi,
thanks for the nice work on taskjuggler!

I'm currently trying to use taskjuggler to manage research projects. Each project comes with associated tasks and funding. I would like to have a per project view of the remaining available funding. The P&L view for this works perfectly fine. But I'm also interested in aggregating all the funding sources and all the costs to see how much funding is still available. For this, I would like to have two top level accounts one for funding and another for expenses. Each would have sub accounts and I would balance the two top-level.

My problem is that in such case I cannot easily (or it seems to me) balance on a per-project view.

Is there a way to do it? i.e. is there a structure for the accounts and some reports that would make this possible, or would that mean allowing to balance two non-top levels?

Thanks for any feedback on this. If this is the latter, I could try to look into the code and see whether I can make this possible.

Best