[MT-AU Public] scripting question

Hi I keep a single rsc file for 2 CCR's that have the same firewall rules simple like /ip firewall filter remove [ find ] # ##### # YB IN # ##### add action=jump chain=YBIN comment="Check YB SRC" jump-target=YBSRC add chain=YBIN comment="Allow SSH" dst-port=22 protocol=tcp add chain=YBIN comment=OSPF protocol=ospf add chain=YBIN comment=NTP dst-port=123 protocol=udp src-port=123 Now I find I have need to have specific rules for each router, for natting. is there some what to include some sort if statement where I can go if hostname = rtr1 then include this line instead of having to have 2 files.