Tridion Docs supports "Review in Tridion" in RWS Trados Enterprise via two custom tasks in Trados Enterprise 

1. Custom Target File Generation (API tridion_custom_target_generation)

2. Tridion Content in Review (API tridion_content_in_review)

This allows RWS customers with Tridion Docs and Trados Enterprise to make full use of Tridion functionality.  There can be requirements which mean that the stages can only be utilised once in a workflow where we need to reject forward to keep the workflow moving in one direction and not reject back to a Translation step as the stage API is unique.

I'd like to suggest that Tridions Translation Organiser be able to recognise multiple instances of these steps with additional API references to improve interoperability with Trados Enterprise by having multiple Tridion reviews in workflows which only move forward.

This could be implemented as 

1. Custom Target File Generation (API tridion_custom_target_generation)

2. Tridion Content in Review (API tridion_content_in_review)

3. Custom Target File Generation 2 (API tridion_custom_target_generation_2)

4. Tridion Content in Review 2 (API tridion_content_in_review_2)

5. Custom Target File Generation 3 (API tridion_custom_target_generation_3)

6. Tridion Content in Review 3 (API tridion_content_in_review_3)

etc...