def queryset(self, request):
        user = request.user
        qs = self.model._default_manager.get_query_set()
        qs = qs.filter(author=user)
        return qs

def get_form_by_user(user, model):
    '''
    Возвращает нужную форму для админки в зависимости от пользователя
    '''
    user_groups = get_usergroups(user)
    if EDITOR in user_groups and not user.is_superuser:
        EditorForm = getEditorForm(model)
        return EditorForm
    elif user.is_superuser or MAINEDITOR in user_groups:
        AdminForm = getAdminForm(model)
        return AdminForm
    WriterForm = getWriterForm(model)
    return WriterForm

#forms.py
def getAdminForm(_model):
    class AdminForm(forms.ModelForm):
        def __init__(self, *args, **kwargs):
            super(AdminForm, self).__init__(*args, **kwargs)
            self.fields['status'].choices = MAIN_EDITOR_STATUS_CHOICES

        class Meta:
            model = _model
            exclude = ('author', 'main_page_status',)
            
    return AdminForm

#admin.py
...
    def get_form(self, request, obj=None, **kwargs):
        form = get_form_by_user(request.user, self.model)
        return form
...