Hi Pior, you can make a construction line for doing that:
https://moi3d.com/4.0/docs/moi_command_reference11.htm#constructionlines

When you move over the existing point you want to project, press down and hold down the mouse button while dragging off of it and a construction line will be created which will then give you an intersection snap point where you need it. Here's an example:



= Michael