It could be. The reasons for my handle on this site, as any, are my own. No harm in asking of course, though since it is unrelated to the overall discussion a pm might be more appropriate. Sorry for the delayed response.
There is a mail feature that provides a way to PM another user. Under "my hubski" there is a "mail" button. You just need to type the username into the "To" field, and they will get a notification. Mail functions similar to a text post, except only the designated user(s) can see it.
What b_b said is true. However, you can also just click on a user's name, and click "send mail to user" which will take you there and auto-fill 'to' line. But, even more fun: you can name as many users as you like in the 'to' field, and start a private group conversation.