Google Sheet : Input or Edit Data Based On Name

hi all..

i have problem in google sheet, i want to my participant (3 users) can input/edit data based on only straight line row/column. The other user can't input/edit if the row/column not have them.
e.g. name "john" can input/edit 'row" straight line with name "john' etc..

here this link file
https://docs.google.com/spreadsheets...it?usp=sharing

any one help me, greatly appreciated..

john m

Have you try to protect range: C2:E2 then set who can editing permissions

hi..thank you.