constrain poles of a 3D spline as in 2D sketcher?

To manipulate 3D splines seems to be tricky for me. Below is an example:

 

Is there an easy way to associatively constrain the 6 poles of the spline to the 6 sketch points in axis Y direction? In other words, if the 6 spline poles are projected to XZ plane, the resulting points would be exactly conincident with the 6 sketch points. 

 

The idea is borrowed from 2D sketch. I'm not sure the workflow is reasonable or not. Hope to have your suggestions.

 

Thanks!