Worksheet Display based upon Database Column Vs Expression

Hi All,

We have a process where users have a two Step Process in a Approval Cycle.

We have the display based upon Expression  (Logical) and we also have a database Column (Physical)

First Step is -Initial Approval- Where Users wanted to see the results based upon the Client Expression. The data will be changing based upon the Client Expression (logical). Once the step1 Is approved.   They would like the data to be Frozen. We tried the Lock Expression but there is a push back as the data seen at the Quarterly , Month and the Week is not adding up as we have business rules.