[Zope-CMF] Content types & user roles question

[Volodymyr Cherepanyak]

Hi,

I found out that in current release of CMF all user roles can create
content of all portal_types.
I want for example:
     user group 'Journalists' -  can put only news.
     user group 'Members'  -  can put only documents.
Is it possible to make with existing CMF capabilities? If possible how?

Regards Vovchyk