Caldera Forms using Custom fields add-on, save the new Post ID as User meta data.

cf-post-id-user.php

<?php
/** Hook in when custom fields are saved by CF Custom fields to write entry ID as user meta */
add_action( 'cf_custom_fields_post_save_meta_key_to_post_type', function($value, $slug, $post_id, $field, $form){
	if( $slug === "meta_post_id" ){
		if( $value === $post_id){
			return;
		} else {
			update_user_meta( get_current_user_id(), "meta_post_id", $post_id );
		}
	}
}, 10, 5 );