His personal 'conduct' reflected poorly on the company. [=he behaved in a way that made the company look bad]
The way you 'conduct yourself' in an interview often determines whether or not you get the job.
Laws and regulations control the 'conduct' [='management'] 'of' business and trade.
(..) The tough thing is, she really wants to have sex. Crazy bitch. I got a week left to go. According to the rules... ...I can't conduct personal experiments, if you know what I mean. Joey, we always know what you mean. How long did you think this barbecue would last? -I'm going to China. (..)1995 TvShow: Friends Title: The One Where Rachel Finds Out Season: 1 Episode 24