Ah, I see the confusion here. Although Tom's IT Pro is a sister site and, in many ways, an extension of Tom's Hardware (both are helmed by EiC Fritz Nelson), you'll notice that IT Pro does not have a forum, thus no "Tom's log in".
We use a proprietary forum software that allows a close relationship between the editorial side and forum side of Tom's Hardware. You'll notice that all article comment sections are actually mirrored as threads here on the forums, and all posts on the article will show up in the thread and vice versa. Tom's IT Pro is not published in the same format (and they don't have a forum), so the comments use a different system.
We don't have any current plans to change that as far as I know, but I'll pass along your feedback