Canadian Charter or the Constitution Act, 1982, provides permanent residents and Canadian citizens with the right to live and work in any province in Canada. Having said that, when a province takes the pain to nominate you (based on the requirement in that province), it is more of a moral obligation than a legal one to stay and work in the province for at least 2 years. On the other hand, if you can prove (which would be a tough one) that after repeated attempts you failed to land a job in that province, then you can move to a province of your choice. If it is established that from the beginning, that you had no intention at all to stay in the province, then you may end up in the hassles of losing your PR. What you state in the 'Statement of Intent to Reside in Toronto' may probably used against you in the worst case.This is my understanding, you may seek the advise of an immigration lawyer in this regard.
You can refer to this link for more details immigration.ca/en/immigration-wiki2/43-canada-immigration/168-mobility-rights-of-canadian-permanent-residents-under-provincial-immigration-programs.