[TYPO3] tt_news category listing restriction

[Antonio Willybiro]

Hello,

I have 2 websites on my typo3 install.
I am using tt_news for both websites and i have created some categories for 
each of them.
My problem is that editors from website 1 can view the categories of the 
news in websites 2.
Is it possible to somehow restrict the editor category listing (in the News 
record: when writing a news and willing to select the category) to their the 
category from their respective website only: editor from website 1 viewing 
only categories for website 1 in the News record editing...

Thanks in advance.
Antonio