I do not think that this is entirely correct. Escrow accounts can take multiple forms and can be used with only ONE beneficiary. The idea is to present a situation where funds were not commingled and dedicated to a specific purpose. Below is an example of the type of account that could be used by the holder of the funds. Although not exactly the same, the spirit is the same. Fwiw, I also believe that most law firms, and especially the ones with title companies connections, can hold the funds to support … a request for a review.
http://www.firstam.com/title/commercial/products/1031-tax-deferred-exchange-services.html