Yes, possible.

As condition use a formula:
=ISERROR(MATCH(A1,listrange,0))

Above example assumes that you have a named range 'listrange' that holds
your separate list of names (of course you could also use something like
$B1$:$B$10) and that your cell containing the conditional format is A1. This
will format all cell entries in A1 that are NOT in the specified list.

Cheers,
Joerg Mochikun

"pkeegs" wrote in message
...
I would like to apply a conditional format into a cell, so that when I type
a
name into that cell, if it doesn't exist on a separate list of names, the
condition will apply. Is it possible?