in Address Book Script I custom a php data entry, I create 10 Row, I put 5 for user-1, user-2 can see the 5 entries with data and user-2 has to respond with the other 5 Row, how can I make User 2 can not make changes to the 5 Row but he can read.
User-1=can Use 5 of 10Row from 10
User-2= Can Use the other 5 but can't do changes to the other five.

It's possible to customize like that but it's byond the scope of this feedback box. I recommend you play with $username = $this->sys->AuthSession->GetV( "username" );. Identifying the username is the first step!