[syslog-ng]2 configuration questions

[ARGEXT-HIDALGO, FRANCISCO]

Hi, I would like to ask you about two things:

1. I have a central syslog-ng server logging everything as IP's because =
we need it that way, but for php-syslog-ng I would like to see them as =
hostnames. It is possible to resolve hostnames to some destinations =
only?

2. We have one syslog-ng server in each region and each of them logs to =
the central server, I would like to be able to log each region to a =
diferent file. I think I can do it by sending from a different facility =
from each region. Unfortunatelly reconfiguring every router and switch =
from the network is not an option, so I was thinking I could do it if =
each regional server resends it's logs with a particular facility, =
changing the original one that it received from it's routers. Is this =
possible?, if not, do you know another way to do it?, I was thinking =
that I could send each region to a different port of the central syslog, =
but I prefer not changing the current configuration if possible.

Thank you,

Francisco