how to connect the author profile with google webmaster tools in multiuser blog?

Question

in this page google help us to enable our profile image on google search list when some one search get results from our blog post.

my question not about how to do that ... like this link that closed ... but about the blog that has many authors that in the Google article i cant find anything about multi user authors and separation.(seperate them and linked their own posts to google result?)

how we can do that , with second solution ?