Audience targeting in SharePoint and Forms authentication

I found good blog: http://www.thesug.org/blogs/benm/Lists/Posts/Post.aspx?List=6804dfd2%2D2949%2D4200%2Da2fa%2Dd9fa55bed583&ID=5&Source=http%3A%2F%2Fwww%2Ethesug%2Eorg%2Fblogs%2Fbenm%2FLists%2FPosts%2FPost%2Easpx%3FList%3D6804dfd2%252D2949%252D4200%252Da2fa%252Dd9fa55bed583%26ID%3D5
But in nutshell - what I already check by now, you can use FA users - if they explicitly in SharePoint Groups, but the user should have at least read rights to web page with web parts (lists) with audiences targeted content.