Although the ANT Internet Suite allows !Marcel to access multiple IMAP mail users over a LAN, it only uses a single default !MarcelDir for mail setup information. This makes it difficult for several users to access their mail and/or read news from a single host/computer.
!IMAPUser overcomes this limitation by providing a menu from which the required user can load !Marcel which automatically initialises the correct !MarcelDir. This makes sure that the correct signature, mail and news history settings are preserved for each individual user.

This utility is of no use to Offline (dialup) users of the ANT Internet Suite since offline use works as predicted, unless preferred.