There are situations where part of a project needs to be invoiced via an order A and a different part of the project via an order B.

e.g. because of different conditions for the different parts of the project like reduced project prices for certain tasks or different payment terms.

Currently this is not supported. It is possible to assign multiple order lines to one project (if "selected tasks" = "Included tasks only") but only if these order lines are within the same order. I would like to be able to assign order lines of different orders to one project.