[PHP-DB] How to: Include identifier with a query

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Greetings!

We are searching for names that might or might not exist in a 4 million 
row db and have to do a lot of fuzzy searches that often don't return 
results.

I would like the use to have the option of killing a query process.  
Since we are apt to have several queries running KILL QUERY doesn't seem 
to work.  I would like to use KILL (process id) instead.  We can use 
SHOW FULL PROCESSLIST to get a complete list of the processes, but we 
need for the code to identify which one to kill.

Here's the question:  How can I "flag" a particular query so it can be 
identified from the array SHOW FULL PROCESSLIST generates?

Thanks!

- Ron