Redirect based on source IP's

when HTTP_REQUEST {
   if {[IP::addr [IP::remote_addr] equals 1.1.1.1/32] or [IP::addr [IP::remote_addr] equals 1.1.1.2/32]} {
      HTTP::redirect "https://login.com/internal.html"
   } else {
      HTTP::redirect "https://login.com/external.html"
}

worth mentioning: if this VS is login.com:443, users will simply end up in a redirect loop

Put all your IPs in a datagroup "allowed_ips"

when HTTP_REQUEST {
    if {[class match [IP::client_addr] equal "allowed_ips"]} {
        HTTP::redirect https://login.com/internal.html
    }
    else {
        HTTP::redirect https://login.com/external.html
    }
}