Page with its own theme, title and menu?

Hello.

I’m looking for a way to provide each side with its own theme, title and menu.

Is that possible?
I only found “Page Theme”.
But this only changes the theme on each page.
Not the title, not the menu structure.

I want to point a domain to a page in a WordPress site (with their own domain).

This second domain is thematically a underside, but it should have its own domain and design.

Example:
First domain:
https://www.Flashmob-Page.com
Menu:
Methods | Message Board | Chat | Flashmob Bulletin

Second domain:
https://www.Flashmob-Bulletin.com
menu:
Methods | Message Board | Chat | Flashmob Page

Or other menu items that belong to the page.
With the last point (or the first, middle, or …) you can switch to the other site.

thanks,
Tobias Claren