Yes. It has to do with federal expenditures. The federal government could get involved in areas administered by the provinces through expenditures, but the areas are defined when it comes to legislative issues.
In addition, the federal government could spend money in the provinces on matters that, according to some, are not exactly in line with the federal government's legitimate objectives. Nevertheless, from time to time, the federal government does spend money in the provinces in areas that don't come under federal jurisdiction, as set out in the legislative regime.