You can get the channel user modes by sending "NAMES <#channelname>" to the IRC server, and then parsing the output from the server which is about in this format (this is from the mirc debug window)
<- :irc.nl.project-apollo.co.uk 353 Juppi = #Miami-Dade :Tamas!Tamas@LU-BCF70FFB.rubicom.hu TyranT!TyranT@LU-9FA04AD5.dsl.telesp.net.br FlAmEsAy!ernestoros@1C9F6C1.B2493FCB.DEE9DE84.IP Devian!Devian@LU-9FA04AD5.dsl.telesp.net.br &@NubCake!TheCake@Is.A.Lie Thijn!Thijn@The.Netherlands.FTW +BB101!No@i.liek.to.bitch.n.moan
<- :irc.nl.project-apollo.co.uk 353 Juppi = #Miami-Dade :Jc17!i_love_ic@88B27F4B.5DC36FB3.A1676F80.IP SGB!lol@LU-353B5B5F.regn.hsdb.sasknet.sk.ca +Rider!Rider@Rides.On.The.Winds +RoboPig!RoboPig@is.not.a.robot +Sampy!Sampy@stirredfork.net @StriKe!StriKe@at.the.worlds.end @j-king`!j-king@88B27F4B.5DC36FB3.A1676F80.IP
<- :irc.nl.project-apollo.co.uk 353 Juppi = #Miami-Dade :G!G@88B27F4B.5DC36FB3.A1676F80.IP Fer_r_ari!Fer_r_ari@88B27F4B.5DC36FB3.A1676F80.IP +Mike!mike@ohh.im.wicked.and.im.lazy @kenwood!afaf@LU-365B719.client.mchsi.com +Ralph!Ralph@i.like.to.watch Mert`!default@LU-3A9A91AF.lobbyzffs.com %Sephiroth!~Sephiroth@gruppe.sechs
<- :irc.nl.project-apollo.co.uk 353 Juppi = #Miami-Dade :+himselfe!yeah@all.sense.and.reason +neil!neil@LU-571E8EFC.nwebsolutions.co.uk +jaqel!jaqel@all.your.boxes.are.cardboard &@Force!The.Force@is.with.you +ozzie!ozzie@stirredfork.net &@+VRocker-Server!vrocker@LU-458FAABC &@+Mattz!Mattz@optimum.online
<- :irc.nl.project-apollo.co.uk 353 Juppi = #Miami-Dade :&@+VRocker!VRocker@liberty-unleashed.co.uk @+Kill3R!Kill3R@lol.lmao.rofl.xD ~@+Juppi!Juppi@the.dark.side ~@+Juppi-irssi!Juppi@the.dark.side @+AdTec_224!AdTec_224@local.host
<- :irc.nl.project-apollo.co.uk 366 Juppi #Miami-Dade :End of /NAMES list.
So as you can see the names list start with 353 and every user in the list has been prefixed by their channel modes:
~@+Juppi!Juppi@the.dark.side
By parsing that data with squirrel string handling functions (check the squirrel manual and squirrel standard libraries manual) and/or custom written GetTok/NumTok functions you can get the modes and save them to an array or anything.
