Venting kitchen sink around window
Typical sink under window:



The venting issue is that you cannot connect to other vents or have a horizontal offset in the vent until it is 6" above the highest flood level rim and at minimum 42" above the floor (see the red portion in the above image).

To avoid a horizontal offset of the vent below the flood level rim, you simply arrange the drainage to come up beside the window, and pipe the sink's trap arm under the window over to the sink (see the green portion in the above image). The only limiting factor is the distance permitted on the arm (the fall cannot exceed the internal diameter of the pipe).