Automated testing of multi-client workflows with Selenium

I'm trying to automate some test cases with Selenium WebDriver. My problem is that most test cases need interactions from different devices. An example:

• Mobile App (Android or iOS) initiates a new workflow
• Desktop user has to approve it
• Mobile user can now continue with the workflow
• Desktop user can continuously see at which step the mobile user currently is

Is is possible to create Selenium Tests that can test these interactions? If yes, how?