To secure dokuwiki you have to deny access to data, conf, bin and inc folder (
http://www.dokuwiki.org/security#web_access_security)
i googled a little bit and found this:
http://www-12.lotus.com/ldd/doc/domino_notes/6.5.1/help65_admin.nsf/0/9cdcf9d944daef5185256dff004b2a7d?OpenDocument
seemes like domino support something like apaches .htaccess files.
please add the domino solution to the
security page when you've found it ;-).