[syslog-ng] Bind source IP using localip()?

[Scot]

Is there a way to bind to a src IP when sending forwarding an event from
syslog-ng ?

We have an alias on the system and want to use that as the sending
IP address for a forward.  Tried the localip option which seems to pass
conf check but ignored for destinations.

Looked in the network and syslog driver documentation and didn't see
anything obvious.

syslog-ng 3 (3.14.1)
Config version: 3.14
Installer-Version: 3.14.1
Revision:
Compile-Date: Mar 14 2018 09:48:15
Module-Directory: //usr/lib64/syslog-ng
Module-Path: //usr/lib64/syslog-ng
Available-Modules:
add-contextual-data,affile,afprog,afsocket,afstomp,afuser,basicfuncs,cef,confgen,cryptofuncs,csvparser,date,dbparser,disk-buffer,graphite,json-plugin,kvformat,linux-kmsg-format,pseudofile,sdjournal,syslogformat,system-source,afsmtp,geoip-plugin,mod-java,map-value-pairs,snmptrapd-parser,stardate,tfgetent,appmodel,tags-parser,xml,geoip2-plugin,afamqp
Enable-Debug: off
Enable-GProf: off
Enable-Memtrace: off
Enable-IPv6: on
Enable-Spoof-Source: on
Enable-TCP-Wrapper: on
Enable-Linux-Caps: on
Enable-Systemd: on
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