I tried in vain to fit 2 LoRAs into one image. I helped myself with this workflow, maybe it will be useful for someone else. The result is not always perfect, the starting image is very important.

In this workflow, a picture with two people is first created with a character LoRA. The same person is then shown twice in the image. One of the people is then replaced using a second LoRA.

Update:

I tried to make the workflow a little more convenient. Once you have selected the models, you can select all the settings you need in the Control group, so you don't have to keep jumping back and forth. I have also added some explanations.

An important setting is Denoise: It's best to experiment a little with the values, I think that a value between 0.8 and 0.97 will give the best results, depending on your needs. The lower the value, the more the result is based on the originally generated image, the higher the value, the more the LoRa and the prompt influence the result. However, higher values ​​can sometimes lead to strange results.

If I have forgotten something or if you have any questions, just write it in the comments.