How-to Add a filter on brodcasted elements in custom post type list

Hi everyone,

i’d like to know if someone can help me to solve an issue I have with a WP Mu project.

i’m trying to find a way to add a filter on brodcasted elements in (custom) post list in the admin panel.. let me explain :

We created a WordPress Mu with an custom post type (a kind of “business directory”), new entries are broadcasted on each site, so the directory can be viewed on any site of the network.

The problem is that some users wants to see “only the post created from their own site” in the admin liste and not “all the directory entries”.

If someone understand what I mean, is there a way to do it ?

Thanks !

Zygo