Yes, you can…
First, upload your image to a free image-hosting site such as imgur.
Copy the URL of your image to the clipboard and paste it into your forum post
Highlight the URL in your post
Click the </> button in the editor
This will turn your URL into pre-formatted text
The result will be a properly formatted URL (although not clickable) that others can copy / paste like this…
http://www.thisisntarealurl.com