I knew I forgot something important. ioBanana.exe adds a colon at the end of those messages.
Code:
if {[string equal $msgtype "STATS"]} {
if {[string equal [lindex $line end] "usertop:"]} {
ioB:sndall $section "--------------------------------=UserTop=-------------------------------"
} elseif {[string equal [lindex $line end] "grouptop:"]} {
ioB:sndall $section "--------------------------------=GroupTop=-------------------------------"
}
continue
}