def METHOD_NAME(self, field, **kwargs):
    if field.name == 'user':
        committee = None
        committee = self.get_object(kwargs['request'], Committee)
        if committee:
            return UserModelChoiceField(queryset=User.objects.filter(group_member__group=committee.group), label="User")
        return UserModelChoiceField(queryset=User.objects.none(), label="User")
    return super(OfficerAdminInline, self).METHOD_NAME(field, **kwargs)