Yes, one of the advantages of proper blogging software is that it allows you to post to a select group of people. In LJ, for example, you can post to anyone who happens to find your post, anyone on your friends list, or a custom list meaning that even those on your friends list cannot read it unless you add them to the custom list. You can even set it to 'private' meaning only you can read it and you can also limit comments - either screening them so no one can read them but you or not allowing them in the first place.

All useful tools to maintain privacy...