I am looking for the same thing.  I have a customer and we have two large projects going for them.  They are wanting to close out one project and I need to send them a statement for that project showing all open invoices (all retention still owing and current unpaid invoices) and a balance owing on that specific project.   I would even settle for a customer statement that shows all projects, but AT LEAST shows which project each invoice applies to. There is no way to send a statement to a customer that they can see at a glance what is still owing on a project.  QB Desktop had this functionality.