You could copy the file freelanceengine\template\project-detail-content.php to child-theme then do what you like.
Hope it helps!
In next update can you add do_action after content on single project page. This is what exactly what i want.
In the file
<div class="content-require-project"> <h4><?php _e('Project description:',ET_DOMAIN);?></h4> <?php the_content(); ?> <?php do_action('after_content_single_project', $project); ?> </div>
So in future if me or someone else want any custom data to print below content, they can do without changing template file.
I am aware of that and i already done that. but what i asked is if you can add above hook into main theme file. then if someone wants to add any data into project detail page below content, they can do by action and don’t need to copy template file into child theme. You can add it in next update though. it will not take more than 2 min to add above line of code.