This is the On/Off LoRA trained for Pony Diffusion.
Include the onoff keyword in your prompt and describe the subject to have a clothed version on the left, an undressed version on the right. This can also be used for creative compositions involving both dressed and nude subjects in the same scene.
It will not behave as expected for models trained on base SDXL, but should work for models trained on Pony Diffusion.