That question is altogether too broad to yield of an answer.Anyone knows a good lawyer in Ontario for International divorce? please help
To begin with, I don't think you will find a lawyer in Canada holding out as practising in the field of "International divorce". Divorce laws are unique to each country and, in those countries where divorces are always or usually handled by lawyers, one must be qualified to practise in that country. You might find some Canadian lawyers with some knowledge of divorce laws in another country and who might have contacts there. That's about all.
You also have told us nothing about the background to your question. Many scenarios are possible. One is that you are a Canadian citizen, living in Canada, who wishes to dissolve a marriage contracted in another country. It may be in such case that you can divorce in Canada and have the divorce recognized abroad under the laws of the foreign country. It will depend on what country is involved. It may be that you will be content to procure a divorce in Canada and not care if said divorce is recognized by the country of marriage. It may be you are a foreign citizen who was married in Canada and now live elsewhere. Or you are a foreign citizen married abroad to a Canadian and now you want the marriage dissolved. I can conjure up more scenarios, if you like.
Or, who knows? Maybe someone here will come forward with the name of an Ontario lawyer who regularly accepts retainers for "international divorce". Maybe it's an emerging area of practise. That would surprise me, but ya' never know.