Generally speaking, no, as we have no official estate or inheritance taxes in Canada. We do have deemed disposition of registered assets and capital property at death however, which triggers taxable income and capital gains tax, but these are payable by the estate of the decedent. So, while the estate may be reduced by these taxes, the funds distributed by the executor are after-tax dollars.
Examples of capital property include real estate, shares in private or public companies, shares held in mutual, segregated or exchange traded funds.