When are you going to add the warehouse management feature that allows users to choose the location to keep inventory purchased or manufactured? I am an accountant for a small firm that is having many sales points around the country. Often stock is moved from one location to another and some locations create their own inventory as well. The ability to account for the stock existing in these go downs/sales point/branches/showrooms will be very useful and will make Manager most likely competitive with any accounting software in the galaxy, because inventory is the most important asset to many trading entities.
All that must be done is, manufacturing and moving inventory from location to location must be done by users with privileges or administrative rights or access. Other users can only sell what is in that branch and also receive inventory from suppliers into only their branches.