Created https://ortussolutions.atlassian.net/browse/COLDBOX-153
In the mean time, you can write a custom validator that does what you need:
http://wiki.coldbox.org/wiki/Validation.cfm#Custom_Validators
Thanks!
~Brad
ColdBox Platform Evangelist
Ortus Solutions, Corp
E-mail: brad@coldbox.org
ColdBox Platform: http://www.coldbox.org
Blog: http://www.codersrevolution.com