How to make file upload a 'members only' option

Hi all

I have a simple issue, but can’t find a solution to it so could use some help! My site is http://www.bibliophone.com (under construction).

I have a submission form (designed in CF7) which allows users to upload an audio and image file. This form opens when a visitor clicks ‘submit’ on the site. I want the visitor to have to register and log in though in order to get to this form.

What makes that simple in theory is that I don’t need anyone else to access the form at all – only registered users/members who are logged in. So it’s just a page that is protected as it were by a log in screen.

But I haven’t the first idea how to do this. I’ve seen some plug ins but what I can’t figure out is which one will do the job I want, and also how a user actually registers. The plug-ins just seem to set up the screen. I need the registration process as well.

It should also be customisable from an aesthetics perspective, so as to match the theme of my site.

Does any of what I am saying make sense?! Essentially I need to do what happens right here on these forums: you have to sign in before you comment. The rest of the site can (and should) be usable to anyone.

Thanks,

Paul