Does Cinema Display daisy chain work in Windows via Bootcamp?
Assuming that you intend to use two Apple Thunderbolt Displays daisy-chained to a Thunderbolt-equipped computer (whether Mac or not) while the computer is booted into Windows, yes, it should work, assuming whatever drivers are needed are installed and the graphics card has enough power to push two displays' worth of pixels.

tl;dr: If one Thunderbolt monitor works, two identical monitors should work just fine, assuming your graphics card can handle both of them at once.