How to add filter to the assignment group field in the modal pop-up?

[Vasu20]

I want the assignment group field in the modal to load only support groups where can i add the filter condition in the code here so that it shows only those.

function onClick(g_form) {

g_modal.showFields({
title: "Please provide all information for incident",
fields: [{
type: 'textarea',
name: 'u_incidentreason',
label: 'Incident description:',
mandatory: true
}, {

type: 'reference', // type of modal (ie text, reference, etc)
name: 'assignment_group', // reference field on the current record used to search
label: 'Assignment Group', // message to display above the search field
mandatory: true, // sets the field to mandatory
reference: 'sys_user_group', // table that the reference field in "name" refers to
referringTable: 'incident', // table of the current record
referringRecordId: g_form.getUniqueValue() // sys_id of the current record

}],
size: 'md'

}).then(function(fieldValues) {

g_form. setValue('u_incidentreason', fieldValues.updatedFields[0].value); 
g_form.setValue("u_incident_creation", 'true'); 
g_form.save();

}

[BharathChintala]

@Vasu20 

add like this change it to how you want

"query" : "caller_id=" + g_form.getValue("caller_id"),

[Ankita20]

This is not working, is this tested?