Add a custom 'Edit Post' link on posts the logged in user authored.Uses tsm_is_current_users_post( $post_id ) helper function here https://gist.github.com/JiveDig/c2d59c4efd996c41dd23. Adds ?post_id=123 query arg to the end of a page URL

edit-post-link-query-arg.php

<?php

/**
 * Add a custom 'Edit Post' link on posts the logged in user authored
 * Links to a separate page with ?post_id=123 query string
 * Uses tsm_is_current_users_post( $post_id ) helper function
 *
 * @author Mike Hemberger
 * @link   http://thestizmedia.com/front-end-post-editing-with-caldera-forms/
 * @return bool/string  false or edit post link
 */
add_filter( 'the_content', 'tsm_do_edit_post_link' );
function tsm_do_edit_post_link( $content ) {

    $post_types = array('post','page'); // Change to your post types

    // Bail if not our post types
    if ( ! in_array( get_post_type(), $post_types ) ) {
        return $content;
    }

    // Bail if not the current users post
    if ( ! tsm_is_current_users_post( get_the_ID() ) ) {
        return $content;
    }
    // Add link to /edit-post/ form with current page ID as the 'post_id' query arg value
    $edit_link = '<p><a href="' . esc_url( add_query_arg( 'post_id', get_the_ID(), home_url('/edit-post/') ) ) . '">' . __( '[Edit Post]', 'caldera-forms' ) . '</a></p>';

    // Return the post content with our edit post link before it
    return $edit_link . $content;
}