200 amp 3 position, 1 position with levered bypass, 125 amp continuous duty.
Can I have:
Position 1: 100amp
Position 2: 150amp
Position 3: Levered By-Pass Position 100amp

The more information you provide in your question, will increase the likelihood and quality of someone offering an answer...

Let's see, do you mean that you have a 200 Amp residential service that you want to split in three directions?

Where is your meter with respect to your service panel?

What are you planning on connecting to these different services? Help us please!

I've never seen a mater can with two standard positions and one lever bypass.
Does such an animal even exist?