(Repeats to amend headline tag, no change to text) HONG KONG, Jan 11 (Reuters) - International businesses in Hong Kong see law and order as key for investing, a city government official said on Monday, in response to concern about the impact of a sweeping national security law on the business environment. Secretary for Commerce and Economic Development Edward Yau said in an interview at a Reuters Next conference that the fact that more money was coming into Hong Kong than leaving was a sign of confidence in the global financial hub. Many businesses and trade associations have raised concern t...