Can we restrict Individual Compensation plans for employee to add one element entry per transaction

We have a requirement to restrict overtime hours in ICP not to be more than 10 hours. We are using one validation fast formula which is fetching the approved entries and through validation error if current transaction hours (from input Value) +apporved hours more then 10.

But employee can submit more than 10 hours in a single transaction by adding multiple entries. Since there is no DBI which could give input value details for multiple element entries in a single transaction, the validation doesn't work.

Is there any way where we can restrict from employee self service to submit one element entry in a single ICP transaction ?