[TYPO3] Hide Content Elements as a result of a condition

[Andreas Wengrzik]

Hi List!

Is it possible to hide a pagecontent as a result of a condition??
I want to show only selected categories from jw_calendar if the user 
called a
specified domain.

tt_news has ts for that but with jw_calender i can just select the 
categories for each
content element.

So i want to create two content elements with the jw_calender plugin and 
hide one of them....

Any ideas / solutions?

Thanks a lot!!

-andreas w.