Thanks for response. Looking at some other options as well. Can we change outbound network interface dynamically for specific process ? looked at use IO::Interface qw(:flags);getIng permission denied when trying to change. Is this require root permission. can we do without root, want to implement in user space.

my $s = IO::Socket::INET->new(Proto => 'udp');
my @interfaces = $s->if_list;

    for my $if (@interfaces) {
        print "interface = $if\n";
        my $flags = $s->if_flags($if);
        print "addr =      ",$s->if_addr($if),"\n",
          "broadcast = ",$s->if_broadcast($if),"\n",
          "netmask =   ",$s->if_netmask($if),"\n",
          "dstaddr =   ",$s->if_dstaddr($if),"\n",
        print "is running\n"     if $flags & IFF_RUNNING;
        print "is broadcast\n"   if $flags & IFF_BROADCAST;
        print "is loopback\n"    if $flags & IFF_LOOPBACK;
        print "is promiscuous\n" if $flags & IFF_PROMISC;
        print "is multicast\n"   if $flags & IFF_MULTICAST;
        print "is notrailers\n"  if $flags & IFF_NOTRAILERS;
        print "is noarp\n"       if $flags & IFF_NOARP;
    }

    my $interface = $s->addr_to_interface('127.0.0.1');
   # my $oldaddr = $s->if_addr('eth0');
    $s->if_addr('lo','X.X.X.X') || die "couldn't set address: $!";
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