In Stockholm, the Alvik station on the Tunnelbanan is a connection point with a light-rail line (formerly the 12, later something else, today maybe 12 again, or 112) to Nockeby. The station (above ground) has 4 tracks with 2 island platforms; the T-banan uses the outside, and the light rail terminates on the inner tracks, providing cross-platform transfer with the T-banan. The platforms are entirely flat, with the light-rail tracks in the center at a higher level than the outside T-banan tracks, which have floor-level boarding (sort of the opposite of what was planned for Kenmore). An unusual wrinkle is that the T-banan is left-hand running, and so was the light rail until Sweden changed over from left- to right-hand road traffic in September 1967. At that time they put in a diamond crossing so that now the light rail leaves Alvik station running on the left and immediately crosses itself on the diamond to become right-hand running; this was done to avoid confusing motorists, who all had to be coached to look left instead of right, as they had done all their lives until then, at intersections. They felt that a trolley line running left-handed in the median or alongside of a right-handed roadway would be asking for problems.
I have an idea there may be some examples in Brussels, but I can't remember for sure. Both Brussels and Stuttgart have stations where part of a platform is low and the rest high, with steps to climb from one to the other and trains (running on the same track) stopping at the appropriate part of the platform, but whether either city has a station meeting
the criteria I don't know.
In Vienna there's a station on the U-Bahn (I think Laengenfeldgasse), a 4-track station with 2 island platforms, where the U4 and U6 have a cross-platform transfer, the U4 being heavy rail and the U6 light rail. I can't remember which line is on the outside, but if it's the U6 it would be an exact example of the plan for Kenmore.