Variable: erc-channel-users
erc-channel-users is an alias and buffer-local for
erc-channel-members, defined in erc.el.gz.
Documentation
Hash table of members in the current channel or query buffer.
It associates nicknames with cons cells of the form
(SERVER-USER . MEMBER-DATA), where SERVER-USER is a
erc-server-user object and MEMBER-DATA is a erc-channel-user
object. Convenient abbreviations for these two components are
susr and cusr, along with cmem for the pair.