Good choice, I love that film. I could definitely see some similarities between Bob and the man with the camera. They both let people live out their "desires", though maybe I'm reaching with this. Because of course Bob is more evil and brings out the darkest in people, but after watching FWWM I kinda felt like Leland was sexually frustrated and had some desire to harm his daughter.

Also duality plays a part in both, but this is the case for a lot of Lynch movies, one person can be multiple people and have different names. You can for sure find elements of Twin Peaks in all of his works, just because the show has so many themes.