In a mixed IV/Fusion environment, CAM can only be applied where the part was designed. i.e. If we design a part in IV, we can link it in and use it as AnyCAD reference in Fusion - but in order to toolpath it, it has to be imported (Create New Fusion Design).
I recognize that file formats, etc.... this is a blue-sky idea. It is, however, a pain point that we deal with almost every day. AnyCAD is a great start. AnyCAM would be a great add.