[Exim] Multiple conditions in filter?

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I have been banging my head agains the wall, and not being able to figure this one out. Below is a part of my filter.

# Exim filter

if error_message then finish endif
if
        ($h_X-Spam-Score: contains "++"
or
        "${if def:h_X-Spam-Flag {def}{undef}}" is "def")
and not
        ${lookup{$return_path}lsearch{/home/j2/etc/mail/whitelist}{yes}} is "yes"
then
        save $home/Maildir/.Trash/
        finish
endif

Now, i would like to do is add another clause to the "and not" part, i would like to also search /home/j2/etc/mail/sort-Return-Path.conf a file with lines like

exim-users-admin@???:                                      .Listor.Exim

so basically, "if the return path is in the sort-Return-Path OR in the whitelist file, do not trash it wven if spamassassin flags in".

Can someone tell me HOW to do this, as i have now tried dozens of ways NOT to do it? (Exim 4.20)
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