http://bugs.winehq.org/show_bug.cgi?id=11070
--- Comment #27 from Kenneth Robinette support@securenetterm.com 2012-05-17 15:32:06 CDT --- Its still an issue. At the current time, the only way to import certificates into the certificate store is with a custom import routine that uses the normal Microsoft CAPI and OpenSSL PKCS12 support.
We added that support in our current SNetTerm product, which currently runs under wine on the Mac (wineskins) and Ubuntu. I suspect it will run under all the newer Linux systems, but not the old ones such as Redhat Enterprise 6.0. The wine developers broke the X11 drivers on the old systems after wine release wine-1.3.28.