disable dnscache ip caching for one domain

Hi All, first post here, nice to meet you :)

I've installed dnscache on Debian Lenny (package name is 'dnscache-run')
to solve a particular dns issue of Asterisk, a software PBX.

It works out of the box, which is very sweet.

Question:
I would like to disable the caching for just one domain: the dyndns domain which gets updated by the box itself.
Is that possible ?


Thanks for supporting,
have a nice day.
Mike