It looks to me that you can set up discriminators on IOS routers to do what you're wanting. The global config command is:
logging discriminator discr-name [ [ facility] [ mnemonics] [ msg-body] { drops string | includes string } ] [ severity { drops sev-num | includes sev-num } ] [ rate-limit msglimit ]
So, you could do something like this:
logging discriminator TEST severity includes 5
!
logging host 172.25.10.25
logging host 172.24.10.41 discriminator TEST
sho log
Syslog logging: enabled (0 messages dropped, 612 messages rate-limited, 0 flushes, 0 overruns, xml disabled, filtering disabled)
Active Message Discriminator:
TEST severity group includes 5
No Inactive Message Discriminator.
Console logging: level debugging, 108380 messages logged, xml disabled,
filtering disabled
Monitor logging: level debugging, 388 messages logged, xml disabled,
filtering disabled
Logging to: vty2(2)
Buffer logging: level debugging, 108115 messages logged, xml disabled,
filtering disabled
Exception Logging: size (4096 bytes)
Count and timestamp logging messages: disabled
Persistent logging: disabled
No active filter modules.
Trap logging: level debugging, 108211 message lines logged
Logging to 172.25.10.25 (udp port 514, audit disabled,
link up),
107002 message lines logged,
0 message lines rate-limited,
2 message lines dropped-by-MD,
xml disabled, sequence number disabled
filtering disabled
Logging to 172.24.10.41 (udp port 514, audit disabled,
link up),
6 message lines logged,
0 message lines rate-limited,
1 message lines dropped-by-MD,
xml disabled, sequence number disabled
filtering enabled, discriminator (TEST)
Logging Source-Interface: VRF Name:
GigabitEthernet0/0/1.9
Log Buffer (16384 bytes):
