How-to include IP address(es) of some balanced Web Servers into HTTP Header?

Here is an iRule with the condition based on the pool choosen :

when HTTP_RESPONSE {
if { [LB::server pool] equals your_pool_name } {
    HTTP::header insert Server_IP "[IP::server_addr]:[TCP::server_port]"
}

Is your iRule going to be applied on multiple virtual servers ?