Sure. The Charter of Rights and Freedoms has rights granted to citizens. Section 6, for instance, says that every citizen has the right to remain in Canada.
As well, because the word “citizen” is embedded in the Constitution, it has constitutional significance. It is not necessarily limited or defined by the way the Citizenship Act defines it. There's jurisprudence in other countries.
In the United States, for instance, its Supreme Court has developed a constitutional jurisprudence—