if ( (substring(option agent.remote-id,0,5) = "Occam")
     and not (substring(option agent.remote-id,6,3) = "MDU")
     and (substring(option agent.circuit-id,0,3) = "DSL") )
{
  log (
    info,
    concat(
      "Port for ",
      binary-to-ascii(10,8,".",leased-address),  # IP
      " (",
      concat (  # MAC
       suffix (concat ("0", binary-to-ascii (16, 8, "",
         substring (hardware, 1, 1))),2), ":",
       suffix (concat ("0", binary-to-ascii (16, 8, "",
         substring (hardware, 2, 1))),2), ":",
       suffix (concat ("0", binary-to-ascii (16, 8, "",
         substring (hardware, 3, 1))),2), ":",
       suffix (concat ("0", binary-to-ascii (16, 8, "",
         substring (hardware, 4, 1))),2), ":",
       suffix (concat ("0", binary-to-ascii (16, 8, "",
         substring (hardware, 5, 1))),2), ":",
       suffix (concat ("0", binary-to-ascii (16, 8, "",
         substring (hardware, 6, 1))),2)
      ),        # End MAC
      ") is: ",
      option agent.remote-id,  # BLC
      "-",
      suffix( concat("0",substring(option agent.circuit-id,3,1)),2 ),   # Port
      " (DSL) uid:",
      pick-first-value(binary-to-ascii(16,8,":",option dhcp-client-identifier),"UNSPECIFIED")
    )
  );
}

---
remote-id "Occam crzz-01-07" and circuit-id "DSL4" logged as:

Feb 14 16:32:34 access00 dhcpd: Port for 10.10.10.10 (00:ff:ff:ff:9f:8c) is: Occam crzz-01-07-04 (DSL) uid:1:0:ff:ff:ff:9f:8c