@Travis Grogan , Currently, user based wildcards ($$USER) cannot be used in calculated custom fields, so I would recommend using a Typeahead field and then having the user enter in their name once the form is added to the object. On the other hand, you can track the date/time in which a custom form was added by following the steps below:
Either create a new custom form (project, task, issue, etc.) and or edit an existing one
Create a new calculated custom field called Date Custom Form Added . If you want, put it under an Admin Only section break.
Change the Format to Date/Time
Leave the calculation field blank and click Apply. This will create your field in the database.
Once your field has been created in the database, click into the calculation text box and paste the following IF(ISBLANK({DE:Date Custom Form Added}),$$NOW,{DE:Date Custom Form Added})
This will track the date/time in which the custom form was added automatically, regardless of whether or not it was added via the Custom Forms tab, Edit Project/Task/Issue or if added through a custom view. If you have any questions, let me know! Nichole Vargas Workfront