Not quite sure what you mean... With wordpress, there's a plugin where you can password-protect your blog posts
1) If we put <meta name="robots" content="index, follow" /> this is for whole web page. 2) If we put <a href="abc.com" rel="nofollow">XYZ</a> this for links. and what about any specific portion of a webpage?
Make a robots.txt and then write in robots.txt Disallow: /webpagename.php Now the whole page does not get indexed, If that is what you want...
As mori stated, you should be able to use robots.txt to block a certain page from getting indexed by the search engines. It would also be best to use nofollow links for any link pointing to that page. Yahoo does seem to pay attention to the nofollow link attribute. So it is best to double up when trying to block a page from search engines.
In Blogger sometime back i recall i had seen such an option. after seeing your post i checked again but no such option are there in blogger and wordpress too.