Hi Natasha, Are you trying to show assignments only for the currently logged-in Head of Section? Can you please clarify / provide more details to assist you better? 

I want if applicant select any names in Head of Section, the Head of Section respectively will received in their own account. 

Thank you for clarifying. When you open your Joget inbox, you'll only see your own tasks - the ones where you need to take action. You won't see tasks assigned to other users.

To make sure tasks go to the right head section person, just make sure you've linked their select box value to the process participant mapping. This way, all assignments will flow automatically to the correct person.

Please refer the below documentations: 
Advanced Participant Mapping
List Inbox Menu

Map Participants to Users

Hope this helps. Feel free to ask any questions or let me know if you need more details!

How to filter data only for particular user to view. After user selected particular head of section, only the selected head of section be able to view the list. 

Please refer:

Setting a Mandatory Search Filter 

List Filter

How to display the list based on the logged in user in the userview?