How to setup auto-reject rule in Excel's invoice when status is not INITIATED/Requester is null?

Summary:

How to setup auto-reject rule in Excel's invoice when status is not INITIATED/Requester is null

Content (please ensure you mask any confidential information):

Hello

I reviewed the excel template and there is an option to setup an auto reject rule and I was wondering if it is possible to add some condictions

BPM Rules Example
if

Invoice line.Workflow.approval Status is not initiated / Or requester is null

then
Call IgnoreParticipants_v2

How I can REJECT an invoice if the requester is null on Excel template ?

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

R13

Code Snippet (add any code snippets that support your topic, if applicable):