Filter wanted

The uploadpatterns filter is great. Is there a way to filter userdata, so that they only have the option of choosing, for example, one of four choices? If they type in something that is not an option, and try to upload, the box becomes red rimmed, and a message like the “cannot be empty!” (not an option!, or incorrect option!)appears beside the field? Or is there a way to make the field a drop down box that they need to choose which option? The position field is where I want this, as only 4 positions are available, they can only enter the available job titles.

http://paramounturgentcare.com/employment/

Thanks again for a great plug-in!

https://wordpress.org/plugins/wp-file-upload/