Hi Hadri1, try this script here:

http://moi3d.com/forum/index.php?webtag=MOI&msg=2599.8

Once the cplane is set then inside the Project command click the "Use CPlane" button in the command options area.

To restore the cplane back to world coordinates you can use View > CPlane > "Reset CPlane" button, or right click View > CPlane, or set up a shortcut key with this:
script: moi.view.resetCPlane();

- Michael