gp-limit-submissions-value-specific-limits.php

<?php
/**
 * Gravity Perks // Limit Submissions // Value-specific Limits by Field
 * http://gravitywiz.com/documentation/gravity-forms-limit-submissions/
 *
 * Form Export: https://gwiz.io/2Nm2JC2
 * Feed Config: https://gwiz.io/2GJ2mRV
 */
// Update "123" to your form ID.
add_filter( 'gpls_rule_groups_123', function( $groups ) {

	// Update to your value-specific limits.
	$limits = array(
		'First Choice'  => 1,
		'Second Choice' => 2,
		'Third Choice'  => 3,
	);

	// Get the first and only group.
	$group    =& $groups[0];
	$field_id = $group->rulesets[0][0]->get_field();
	$value    = rgpost( "input_{$field_id}" );

	// If no value, don't limit the form.
	if( ! $value ) {
		return array();
	}

	$group->limit = rgar( $limits, $value );

	return $groups;
} );