Yes. Simply log into your c7 Portal control panel using the following query string:
http://www.yoursite.com/cgi-bin/c7/admin.pl?ac=home&auto_go=Program Code Here

Program Codes:
ppSD - Password Protector SD

Note that this feature is only available to copies of c7 Portal installed after 6 Nov 2006. Current members can upgrade to the newest version by downloading the installation files from their Ascad Networks account and replacing the *.pl file currently on their servers with the newer versions within the ZIP file.