Initial revision

Completion/User/_my_accounts

@@ -0,0 +1,14 @@
+#autoload
+
+local expl nm="$compstate[nmatches]"
+local accounts_users_hosts
+
+local varname="$words[1]_accounts"
+
+if [[ ${(P)+varname} -eq 1 ]]; then
+  accounts_users_hosts=( ${(P)varname} )
+else
+  accounts_users_hosts=( $my_accounts )
+fi
+
+_user@host

Completion/User/_other_accounts

@@ -0,0 +1,14 @@
+#compdef ytalk finger
+
+local expl nm="$compstate[nmatches]"
+local accounts_users_hosts
+
+local varname="$words[1]_accounts"
+
+if [[ ${(P)+varname} -eq 1 ]]; then
+  accounts_users_hosts=( ${(P)varname} )
+else
+  accounts_users_hosts=( $other_accounts )
+fi
+
+_user@host

Completion/User/_users_on

@@ -0,0 +1,11 @@
+#autoload write
+
+local expl
+
+if which users >/dev/null; then
+  _description expl users logged on
+  compadd "$@" "$expl[@]" - $(users) && return 0
+else
+  # Other methods of finding out users logged on should be added here
+  return 1
+fi