mikeee12345
Any mechanical or electrical supply house will sell Uni-Strut or Super-Strut steel or aluminum channel in 10ft lengths, most of the commercial or industrial contractors will have this product in their shop right next to their conduit and piping that they use daily. This channel has predrilled holes for mounting on a wall or ceiling they also make a trolley wheel system that will run inside the channel, but for your application you could turn round balls or use short pieces of dowel to provide a moving anchor point for the curtain in the channel.

If you scaled this down in size you could use a router and cut a T-slot in a 2x2 board and mount this to the ceiling and use flat washers to slide in the track.