DFF attribute, Intially Editable later user enter the value it should grayout

I need to build Forms Personalization on specific DFF attribute,Once implemented, the field will not be grayed out, but user will enter the specific LOV value and save the Form , in that case the DFF attribute Should be changed to Read only mode.There is no scope to user t0o change the value for the second time.

Can it be feasible by forms Personalization or through any other means.