Unless I'm missing something you can't do this. You can filter by car class, car type and drive type but not manufacturer.
I don't have the game in front of me, so bear with me, but I thought you could. I know I pulled up Ferraris, because I needed one for a photo I was trying to get the other night. A workaround may be having the list sorted by manufacturer and using the bumpers to jump between manufacturers that way.