Short answer
Independent living is typically unlicensed in Wisconsin, since no personal care is provided -- it is housing plus services like dining and transportation. Assisted living in Wisconsin is licensed by DHS's Bureau of Assisted Living, almost always as a Community-Based Residential Facility (CBRF) or Residential Care Apartment Complex (RCAC).
The practical line
If help with bathing, dressing, medication management or mobility is already needed, independent living is the wrong category, regardless of what a community offers to arrange through an outside caregiver. Several Milwaukee-area campuses combine both levels on one site, letting a resident move from independent living into a licensed CBRF or RCAC without leaving the community.
