Nope, get_queryset is a method on a view, not for a data element within a form. (get_queryset is to retrieve the entities being viewed in something like a ListView - a different requirement than the filtering of choices in a form.)
You would create your form with this field based on a ModelChoiceField, using a custom queryset for limiting the options.
I’m getting the impression that you might be confusing a view with a form. A view is a representation of an entire page being rendered, a form is just one component on that page. As such, a form is a different object, usually defined in a forms.py file. (In your case, I believe you’re looking to use a ModelForm.) The get_form method then just creates an instance of that form. Within the model form definition, you have the ability to override the definitions of specific fields.