Grouping contents by work division and showing tasks only to right work division

Summary

I need to show workflow tasks only to the correct group

Content

I have some groups on my company, like IT division, Marketing division, Legal division and more ..

We have contents on our KA that are created by all of those divisions with some workflow steps.

For example:

My workflow is something like this:

Step1 (Creation) -> Step2 (Revision) -> Step3 (Publish)

When someone on IT division creates a content and starts the workflow, I need that only persons from IT division (that have access to Step2) can see this content on TASKS TAB. Because nobody from other divisions can approve this workflow step, only from IT division.