How to filter contacts based on account for standard ContactNameTemplate on work order?

Summary:

How to filter contacts based on account for standard ContactNameTemplate on work order ?

Content (please ensure you mask any confidential information):

We have one field contactVF which is having standard picker assigned to it. That picker is currently showing all the contacts. We want to limit those contacts to contacts associated with selected account.

It is not allowing me to duplicate the standard template, so I created custom one and gave the filter criteria. But with custom picker it is not populating the service Address, Site contact email and Mobile phone, which we is getting populated by standard picker.