Unfortunately, it is not possible to create such members area as you wish.
As for 'Login' module below I will try to explain how it works.
Visitors of the site have possibility to be authorized, to be registered and to change their personal data (e-mail, name..etc...).
The possibility to be registered on the site can be selected, so all modules should work with anonymous users and registered ones.
If user is authorized on the site, modules can use his data from his personal information and input this data as default one which makes it easier to work with modules.
This module helps users to work with other modules. For example, I have added following modules on the page: Login, Eshop and Forum. Published the site. After that registered one user 'test' in Login module. During registration I have set all information (Name, Last Name, phone and etc..). Right now, I'm visiting the site where following modules are added Login, Eshop and Forum and where my 'test' user registered in module 'Login'. I click on Login module, authorize myself under 'test' user and continue to work on the site. For example, I wish to add some comments on the forum: Forum -> Category and can see that my 'Author*' name is already inserted by Login module, because I'm authorized on the site already. Another example, I go into Eshop and going to buy some staff: Eshop -> Buy -> Checkout and can see that most of the fields are already inserted by information from Login module.
This how Login module works. You should try it.
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