User lookup by partial email match

$core_v2_user.Lookup does not support a partial email lookup, only exact matches on Username, Id, contentId, Url and partial matches on Username.  I don't believe we expose any partial email address lookup to any API

This actually worked - putting a wildcard character in the EmailAddress parameter
#set($pagedListResponse = $core_v2_user.List("%{ EmailAddress = 'lucasrayd*' }"))

This actually worked - putting a wildcard character in the EmailAddress parameter
#set($pagedListResponse = $core_v2_user.List("%{ EmailAddress = 'lucasrayd*' }"))

You are correct, the API does not make that clear, but the EmailAddress field is ultimately used in a LIKE clause in SQL, so wildcards will work.