how to derive constant charge account segment for project PR

Summary:

Hi Team,

We have account rule definition in place to generate the charge account based on Item Category. Our requirement is this rule should work as defined but if we are creating project PR it should populate the specific account code ex: 12345 else for normal PR it should be based on category.

Content (please ensure you mask any confidential information):

This is requirement only if user creates project PR and for normal PR without project it should derive account based on item category as defined in account rule.

Version (include the version you are using, if applicable):

We are using 26A