Sure can! In either case, logon (or login) to the account you want your mail forwarded from, and:
tell mailer set forward snow@sherwood.forest
Replace the snow@sherwood.forest with the complete mail address (not a NAMES nickname) of the account that you want to receive your mail. There are a couple of quirks in forwarding mail on CMS; the most important is that only mail items that the Mailer recognizes as electronic notes are forwarded. (See Quick Facts for Forwarding Mail on CMS.