How can I filter https when monitoring traffic with Wireshark?
As 3molo says. If you're intercepting the traffic, then port 443 is the filter you need. If you have the site's private key, you can also decrypt that SSL . (needs an SSL-enabled version/build of Wireshark.)
See http://wiki.wireshark.org/SSL
tcp.port==443 in the filter window (mac)
"port 443" in capture filters. See http://wiki.wireshark.org/CaptureFilters
It will be encrypted data though.