HTTP monitoring from a shared server

It is definitely possible, assuming 2 things:

1. There's a pool named or that can be derived from the requested host name, and

2. You should check to make sure the pool exists before trying to use it.

set pool [string tolower [HTTP::host]]_pool

or

set host [string tolower [HTTP::host]]
set pool ${host}_pool

if { [catch { 
     pool $pool
}] } {
      Send to default pool and log error
     log local0. "Requested pool ($pool) doesn't exist"
}