Can I make certain cells confidential?

I am looking to be able to keep cells confidential so only the user who inputs the information can view the data in that cell. Hiding the Column/ row would only work if somehow I could create a form that would allow each user to input information to the same line item periodically. The data will be entered weekly and need to be kept within the same line item as that would define the user entering the information. Is there a way to keep cells confidential? Or perhaps a way to create multiple forms that are line specific?

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