Lock an objects (ridgidbody) translation on the +Z axis only?

Anyone know how to do this i’m assuming you need python for this as i can’t find anything in the logic bricks or maybe i’m missing something?

Locking object movement in Z axis would be useful for me too:D

Wait, you told rigidbody? There is button for that. I am llokin for something different though. In physics tab there shall be button.

it does not work, (the lock movement buttons in physics work in 2.75)

but not in versions before,

You can lock everything on the z axis but no option for just the +axis