The US has ITAR. If you have certain government contracts you are prohibited from selling products or providing access to certain foreign nations (blacklists),

The US has ITAR. If you have certain government contracts you are prohibited from selling products or providing access to certain foreign nations (blacklists), or a complete export blanket ban. For instance, I recently started investing in an excitingly expensive hobby, night vision. The tubes in those things are so heavily restricted that I cannot even let a foreign national touch them, technically. Which makes it interesting considering my girlfriend is a Tunisian foreign national here on a work visa, so technically I cannot show her my cool new toys I spent thousands of dollars on.