Short answer: Yes.
Here at Codeable, WordPress is the common thread that connects our community of experts. We specialize in WordPress.
That being said, all the experts on Codeable come from a wide variety of technical backgrounds, and we do complete non-WordPress projects and tasks on Codeable fairly often.
If you have a project you need help with that is unrelated to WordPress we would still advise you to post it for our experts and see if we have any who are familiar and interested in helping with the requirements of your non-WordPress project.
Remember, it's always free to post, and no-obligation to hire if you do receive an estimate on your project. This means you have nothing to lose by posting to see if we have someone who can help.
We cannot guarantee we will have someone who can estimate but the majority of projects posted on Codeable do get estimated so your odds at finding the help you need this way are good.