Hi,
Even if what you say makes sense for your case, it would be quite tricky to control it.
Do you want to disable a motion blur for an object for a camera? Or you want to disable motion blur for an object for entire scene? There is a separate motion blur menu for each object in objects properties, but IIRC Corona does not respect it. Maybe it makes sense to feature request respecting it and that is the ultimate solution for you?
As I understand the objects are animated with keyframes, right?
I am pretty sure that what you want can be achieved by adding a few more keyframes with, or just simply rendering with and without motion blur and then compositing. That should be the case for architectural illustrations surely, as almost any visual material consist of some layers and is used in different ways.