Hi Ingemar!

The kilted equivalent of a tuxedo (smoking) is as follows:

a black dress kilt jacket-- a Prince Charlie coatee or black dress Argyle jacket are the most common;

a white tuxedo shirt;

black bow tie;

tartan, diced, argyll, or solid colour (preferrably not white) hose;

black shoes;

dress or evening sporran.

If you are wearing a waistcoat with your jacket then you do not wear a belt.

Hope that helps, and enjoy your evening!

MoR