As long as you remain a legal resident of NYS/NYC, your income remains fully taxable by both - regardless of its source.
An Oregon non-resident is taxed by Oregon only on Oregon-source income. Income is "sourced" where the work is actually (physically) performed. Therefore the income you earn by working remotely in NY is not taxed by Oregon. You should request your OR employer to withhold NY taxes.
(Only a handful of states currently tax non-resident telecommuting income. They are Arkansas, New York, New Jersey, Nebraska, Delaware, and Pennsylvania.)
**Answers are correct to the best of my ability but do not constitute tax or legal advice.
