Winclone is a flexible application that allows imaging and restoring from drives attached internally and externally. However, the Boot Camp configuration supported by Apple is for internal drives only.
Please check Apple's knowledge base if you are unsure about a particular configuration. If your Boot Camp configuration is supported by Apple, then it will also work with Winclone.
Winclone works on Apple Mac hardware.
The source Boot Camp partition must have been created with Boot Camp Assistant or OS X Disk Utilities to image successfully with Winclone. Use of third-party disk partitioning tools to modify Boot Camp will cause imaging and restoring to fail.