I have a question about conforming an object to another object...like in 3ds max in the freeform tab You can select a ref mesh that the active object is constrained to. If i move a vert in this setting it will conform to the ref mesh. If the ref mesh is open and i try to move a vert past an open area , i can't!!. Very good for precision. Is there and tool equivalent to that in blender or does retapoflow offer that? Please Help
Have you already taken a look at Blenders Object Constraints?
https://docs.blender.org/manual/en/dev/rigging/constraints/index.html
https://en.wikibooks.org/wiki/Blender_3D:_Noob_to_Pro/Advanced_Tutorials/Advanced_Animation/Guided_tour/Const/index
1. Select 3D object (in viewport) - Properties panel, add object constraints
Here are a few tutorials to get you started in the field of object motion limitation:
Blender Foundation - Fundamentals videos (41)
https://blog.sketchfab.com/tutorial-rigging-and-animating-a-combat-jet-in-blender/