Hi,
You can use BRANCH step in wM as if else / switch based on the evaluate labels (T/F).
Let me ask you few questions
1> From where do you get the unique id? Do you have a variable that holds this id?
2> If yes then branch on that variable and invoke the flow svc1 and flow svc2 based on your requirement
3> Let me know if you still have doubts/questions.
I have to create a flow in such a way, if empid is 123, the flow has to invoke its corresponding service1.
If empid is 456,the flow has to invoke its corresponding service2.