[exim] splitting $domain

I know that in postfix, the domain can be split into parts (ie:
mail.example.com %1="com", %2="example", and %3="mail"). Can this be
done in exim? I have search through
http://www.exim.org/exim-html-current/doc/html/spec_html/ch10.html and
could not fin anything.
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Kyle A. King
Quentus Technologies, INC
Cell: 703-635-9512
Work: 253-218-6030
Fax: 206-462-1861
Email: kyle.king@???