Posting in a Facebook Page with security customization via API

Posting in a Facebook Page with security customization via API

I need to post in a Facebook page (as administrator of course) by using
API Graph functionalities and I need to specify the privacy parameters.
The behaviour should be exactly like adding a post in this way:
http://picpaste.com/pics/XZnpXFAs.1377523159.jpg
Once you click in "Luogo/Lingua" it will be open a new dialog message
where you can choose the country, city in order to localize your message.
This means that users from different cities/countries you've indicate
cannot see the post in the page. Basically I need to create the correct
url to do this in the way of
/<page_id>/feed?message=mymessage&otherparams
But I can't find any example or suggestion. Thanks in advance.