My wife works in the audit department of a bank. I'm heavily regulated by the SEC on what stocks, ETFs, mutual funds I can buy/sell. An internal group monitors my buying/selling and makes approval/denial before I can do so. I have to hold an ETF for 1 month before I can sell it--not that I should be swing trading ETFs, but still. It's very frustrating at times, especially when I'm relegated to using just her bank's t…
I can't think of any other situation when one person getting a job puts legal obligations on their spouse, but I haven't looked into it.
When I worked in finance, myself and my wife also had a lot of restrictions in regards to our investments.
Anyways, these are just a few examples, but there are a lot of domains of activity where restrictions extend not only to the direct employee but also to their spouse or direct family.