the ministry of Thailand rep who interviewed on YouTube specifically said it's money coming into Thailand not money that's in foreign accounts. And my visa lady today told me it's money coming into Thailand via swift and other digital methods that's liable to this tax.
money transfers into Thailand are what's taxed it's considered foreign income and your thai bank will report it. Limiting transfers to under 120k a year i think would be a good idea if your looking to not bring attention to yourself.