I may have misinterpreted your answer based on the lack of information given.
If you don't care who the end user is, and make both forums accessable to them no matter if they're a guest or owner, you'd simply create another HTML document and link to that document (provided that your web server can serves "static" content).
For instance, say you created another file called owner_form.html
and somewhere within the body, you had:
<form>
...
</form>
From your index.html
you could link to owner_form.html
via a <a>
tag like this:
<a href="owner_form.html">... Contents that will redirect you</a>
(old answer)
No, this is not possible in only HTML and CSS. Not even (securely & validly) with JavaScript.
HTML and CSS don't have the ability to differentiate the client using the page on their own. And JavaScript can't securely do this either.
You should look into server-side programming. This is where the magic would happen for you. You can try many different frameworks / scripting languages that have web-server functionality to them, for instance, some of the popular ones are:
- Ruby on Rails
- PHP
- NodeJS
- Django