I am representing a client and I want to protect myself in case there is any future conflict. Can I, in my fee agreement, have a waiver of future conflicts for a client?

The better practice for a lawyer is to worry about the client’s representation now and not worry about a future conflict of interest. Every lawyer should remember that law is still a profession, not a business. The lawyer’s focus is on what is good for the client, not necessarily what is good for the lawyer. If a lawyer believes there may be a future conflict of interest in a case, then the lawyer should be upfront with the client and perhaps not take the case.