Once you have Litecoin (LTC) in your QuadrigaCX account, you will want to request a withdrawal. You can easily find the withdrawal button on the Dashboard page under your Litecoin (LTC) balance which will then prompt you to enter the amount of Litecoin (LTC) and wallet address you want to send them to. If you are actually trying to withdraw CAD then you would first have to first make a trade to sell your Litecoin (LTC) on the exchange.
Important: As noted on each currency's withdrawal page, do not send a different currency to another's address. i.e. do not send Litecoin to a Bitcoin address etc. If you make this mistake, there is nothing we can do.