Selecting Category in Item submmission

ggppdk said:

The proper way to do this, is using ACL, for the user group of your authors, only give create permission to the last level category,

this way the will be able to see all category tree but only assign categories to the last level categories

I don't understand what you mean. If I disable create permission for top and middle categories for author than last category get inherits permission from top or middle.

You should use "soft deny" for these category
this means
-- creating a new user group and use "inherit" for create permission for these categories,
-- then set to "allow" for last level categories ...

note user must not belong to a second user group that has "allow" or inherit-allow for these categories