[SUSPECTED SPAM] Filtering incoming connections on the basis of the ID string

[Luveh Keraph]

I would be interested to filter incoming connections depending on the exact
nature of the ID string supplied by the customer.  RFC 4253 specifies that
that ID string should conform to the following structure:

      SSH-protoversion-softwareversion SP comments CR LF

I would like to be able to selectively allow incoming connections to
proceed (or terminate them there and then) when the value of
softwareversion (or even comments) matches some predetermined pattern. Is
this something that OpenSSH servers can do?