Is it possible to write an Irule for SSL exception based on IP address?

Question 1:

Yes, by doing something like this:

when HTTP_REQUEST {
    if { [IP::addr [IP::client_addr] ne 10.55.22.22] or [IP::addr [IP::client_addr] ne 10.55.22.23] } {
        HTTP::redirect https://[getfield [HTTP::host] ":" 1][HTTP::uri]
    } else {
        pool http_pool
    }
}

Note that data group lists are recommended if the list of IP's grows longer.

Question 2:

Yes.

/Patrik