The Family Law Act, s. 91 allows a spouse to apply for an order to prevent depletion of family assets. The court may make an order "prohibiting the other spouse from disposing of, transferring, converting, or exchanging into another form, property in which the applicant may have an interest."
Further, even though the default is an equal division of family property, a court can order unequal division if equal division would be significantly unfair (s. 95). One factor that a court may consider is whether a spouse
disposed of, transferred or converted property that is or would have been family property, or exchanged property that is or would have been family property into another form, causing the other spouse's interest in the property or family property to be defeated or adversely affected.
In assessing whether a property protection order is appropriate, or determining whether a spouse improperly depleted family property, a court does not conduct an audit. But the court will want to see detailed financial statements from the parties. Such statements are mandatory under the BC Supreme Court Family Rules. The form is Form F8. Note that it requires disclosure of "all real and personal property disposed of during the 2 years preceding this statement or, if the parties married within that 2 year period, since the date of marriage."
Ontario has a very similar scheme, set out at ss. 5 and 12 of its Family Law Act.