How to carry a string over from one chain to another in iptables?

Here's what I'd like to do.

In my rule file (which I use with iptables-restore) I have (with limits removed):

-4 -A LOGDROP -j LOG --log-prefix "ipt:4:drop "
-6 -A LOGDROP -j LOG --log-prefix "ipt:6:drop "
   -A LOGDROP -j DROP

And I want to not repeat myself at the end of every chain. So it would be awesome if in the other chains I am jumping from I could already set strings such that I could assemble them in my LOGDROP chain into the log-prefix.

Is there a way to accomplish this?