Partial Motion Blur in Cycles Is there a way to make Motion Blur to have effect only on certain objects?

Like if I want the main scene to be still and don't have a blur while camera moving, but all the other object want to be blurred.
Not sure if feasible for your project, but you could parent all your objects in the scene to an empty and move the empty instead of the camera.
Also, turn on motion blur in your render settings and turn it off for the individual objects that you don't want blurred. (In the Object Properties Panel)