Or to make it easier: you just want to disable the caching in order to see your changes in realtime.
Any solution that would allow you to disable caching based on IP, logged user or cookie will be acceptable.
2 Answers
It has this natively: Performance > Page Cache > General > Don’t cache pages for logged in users
You can always check if you are seeing cached page by looking at page source, W3 outputs status (commented out) at end of page.