Place all clarifications task/activity in the Applicant swim-lane so that the clarification returns to the applicant. There are many examples of process design in the default apps in Joget: CRM, Internal Service Request, etc. You can also download and learn from many demo apps in https://marketplace.joget.com/.

thank you for your help , actually I’m trying many apps .

But the problem here is that he does not wait to complete the 4 approvals in one level.
When the one approver makes an approved , he moves to the second level without waiting for the remaining 3 approval !   

I think something like that might work for you. It necessarily requires some programming: you would have to define how many approval cycles you require and keep track of each iteration. And on the other hand you would have to choose (in some way) who are the 4 approvers in each cycle. You note the route elements with the "+". Those must be of type AND so that they generate and wait for all the tasks.

Hi, you can try the Process Enhancement Plugin#MapActivitiestoForms-MoreSettings, there is an option to set multiple approval for all assignees.