I don't think so, Bri, because for 401(a)(4) you aggregate plans of the employer, including a controlled or affiliated service group employer. You also aggregate, of course, DC plans of an employer or controlled or affiliated service group employer for 415, but Treas. Reg. 1.415(f)-1(f)(1) has a special rule for 403(b) that treats the participant owner of the 403(b) contract as the employer with respect to it, but that is only for 415.