One rentention bill for all the AR invoice under project

Hi,

Currently when we process billing from project and release the AR invoice generated from billing process, then system is prodcuting one retainage invoice for each monthly project invoice.  is there a way to get one retention bill ?

I've also found a related post on Acumatica forum for this issue, but it;s mentioned that combining released retainage into 1 invoice is planned for further version of Acumatica. 

AIA retention billing | Community (acumatica.com)

Thanks 

Pankaj