Currently, the Canadian organisation is no longer active. Out-of-date information about UniForum Canada is available here.
Since the Canadian organisation is no longer active, and since MUUG is not affiliated with UniForum (the international association), you can no longer join UniForum through us. If you are interested in joining UniForum, you should now do so by contacting UniForum directly.
Also note that there are groups in Canada, such as UniForum Montreal, that are affiliated with UniForum (international). You may contact them directly if you wish to join UniForum from within Canada.