http://bugs.winehq.org/show_bug.cgi?id=9535
--- Comment #2 from Juan Lang juan_lang@yahoo.com 2007-08-31 15:22:58 --- It's not clear from the log what's going wrong. However, WinPCap installs a network filter driver, and that won't work in Wine, nor is it likely ever to be supported.
By Cain Abel, do you mean: http://www.oxid.it/cain.html ?
Since the interface to WinPCap is nearly identical to libpcap, it should be possible for you to write a replacement WinPCap dll that talks natively to libpcap. Or, contact the Cain & Abel developers and ask for a port.