http://www.comp.leeds.ac.uk/Perl/matching.html:
A vertical bar | represents an "or" and parentheses (...) can be used to group things together:

jelly|cream # Either jelly or cream
so in the case that my names have no underlying sheme, this should be:

sourceName_match = "^NAME1$|^NAME2$|^NAME3$|^NAME4$|^NAME5$"

with NAME1-5 the real names of my toons...

sounds very interessting, so thanks for the info