The courts are willing to offer security for an order for spousal support, even when such an order is made on an interim basis. In the Hutton and Hutton decision, the Superior Court of Justice made an order for the payor to secure his spousal support payments with life insurance by naming the receiver as the beneficiary for the same.
http://www.canlii.org/en/on/onsc/doc/2015/2015onsc6698/2015onsc6698.html