Do you know if there is a Track Lighting system that allows you to turn individual lights on or off on the track. I would like to have certain lights on the track on in the evening and the rest on the track off.

There is two and three circuit track available, each circuit can be switched indepenently. Most popular brands of track have this track available.

This track is usually used for commercail installations. If you want this for home use, you may find it a bit too expensive.

There are some track heads with built in switches, but most times these are not practical as the fixtures needs to be within reach.