In the first part of your code:
The above code means you're matching all text, to only when you're a channel operator in all channels.
# = All channels
#mIRC - Will only trigger on #mIRC
#Hello,#my,#name,#is,#Andy will trigger in these channels.
on @*:text:*:#Channel1[color:red],[/color]#Channel2[color:red],[/color]#Channel3:{
Which will only work in #Channel1,#Channel2 and #Channel3.
-Andy