How can I access someone else’s Amazon Seller Account incognito?

My friend wants me to do some listing/advertising work on his new seller account. I’ve been told that, if for whatever reason someone has serious problems with their account, any account associated with that account will also face problems. If I access his account, it will be from the same IP address as the one I access my own 2 seller accounts from but I don’t want them to be linked.

Is there a way around this? Can I for example access it via VPN without Amazon tracking it or do they have other ways to link that I’m not thinking about?