To answer your question from a anecdotal perspective, I myself bot on multiple accounts while consecutively playing on main accounts. I don't use a vpn and I have yet to be banned on my legitimate accounts for interacting with my illegitimate ones. I take precautionary steps for trading with the illegitimate accounts, for example instead of trading directly with them I will stake against them in order to get the gold farmed gp. But the point is to date I have yet to be banned for botting/gold farming on account y for the illegitimacy of account x.
You are probably safe.