Is there any way to give another employee access to only forms they create?

Is there any way to give another employee access to only certain portions of the account (i.e. only forms they create)?

You can add that employee as a sub-user of your main (paid) account. Once added, you can grant him permission to access only the forms he/she created that is stored in your account.

Please see this guide for more information — How-to-Share-Forms-with-a-Sub-Account-User