Check website of Lan Kwai Fong Entertainments in Hong Kong and email them. They have several restaurants and may need chefs
Or check the Igor's Group website
www.igors.com. They run quite a few restaurants.
Also assuming you are an Italian chef, I'd suggest contacting the Italian restaurants in Hong Kong. Like Va Bene, Baci, Gaia, Grissini, Nicholinis etc. These are the big ones but there are hundreds of smaller joints. Do a google search or check
www.eatdrinkhongkong.com or you could probably find many on this website too
You could also try the Soho association