how to do mapping user to user in drupal
So you have 4 user roles and 2 different content types. The first 2 user roles work with content type 1 and the other 2 user roles with content type 2.

I believe you'll find the answer to your question on this page as it explains:


How to configure Workbench Moderation states
How to configure and check Workbench Moderation transitions for each role


So you can set additional States according to your needs but the three default States of "Draft", "Needs Review" &amp; "Published" seem to do the job for your case. You can also set what transitions between which states should generally be available and then configure the transition permissions for every role according to your needs.

Applying those guidelines, a Contributor1 user would create a node of content type 1 (in "Draft" state), given that they have the proper content creation permission. After that, Contributor1 would not be able to do the transition to other states for that content type. On the other hand, Validator1 should be given permissions to do the transition from "Needs Review" to "Published" for content type 1.