Seems Jeff Kam Chun-Man (金浚汶) is credited as Jeffrey Lam Wai-Hung (林偉雄) in some movies, have been a bit puzzled as I have been unable to find the person portrayed in the images under Jeffrey Lam Wai-Hung as there are rather few actors in the Troublesome Night movies, so I decided to take a little check.

Jeff Kam Chun-Man is in all the below movies where Jeffrey Lam Wai-Hung is credited, but where I've been unable to find Jeffrey Lam Wai-Hung :

Metade Fumaca
Troublesome Night 10
Interactive Murders
Troublesome Night 15
Troublesome Night 8

In Metada Fumaca the actors are listed with their roles so should have been easy to spot the person on the images under Jeffrey Lam Wai-Hung if he where there, instead Jeff Kam Chun-Man is easily spotted.
The only Troublesome Night movie where Jeffrey Lam Wai-Hung is listed with a role is #15, but to me it doesn't look like the person in the images under Jeffrey Lam Wai-Hung, instead Jeff Kam Chun-Man appears as a Japanese Soldier, will upload images from it once I'm done with it.
I don't have any off the other movies where Jeffrey Lam Wai-Hung is credited so I'm unable to check against them.

Will split and merge movies under Jeff Kam Chun-Man were ID has been confirmed to be him, and add Jeffrey Lam Wai-Hung as an alias to Jeff Kam Chun-Man in 2 weeks if nobody stops me