how to assign test steps to different testers in a test execution in Zephyr?

Hi

In Zephyr Scale, I 1st create a test case with 5 test steps. I then created a test cycle and add this test case to the cycle. 

Each test case in a cycle is assigned to only 1 tester in Zephyr. However different testers are assigned to the 5 test steps of my test case. And test steps have dependencies, i.e., step2 can only start when step1 passes testing. 

I can assign the whole test case to 1 tester, and include tester names in "Test Data". All testers can update their testing status. However testers can not track their assigned and completed testing in Zephyr

Any suggestions?

thanks

Nina