I work in conduit and run single wires. I have a weird one.
I have an always-hot (black) and neutral (white) pair that run from the panel passing through A to serve loads at B and C.
At C, always-hot (black) continues to a switch loop at D. The switched-hot (blue) comes back through C, B and A to go down another branch, AA, to serve the lamp.
The neutral for the lamp (white) goes from AA through A back to the service panel.
The circuit has 2 neutrals (white), one serving the receptacle loads at B and C, and the other serving the lamp load at AA. They pass like ships in the night at A, not connecting, and run alongside in the same conduit from A to the panel.
Edit: Here is a drawing. I added a second circuit (red/gray) that is unrelated, simply to illustrate that boxes B and C have a lot of other stuff going on.
Is it kosher for the circuit (black) to have two neutrals on the neutral bar?