When does a conflict of interest exist regarding client representation?
Answer
When representation is directly adverse to another client, or materially limited by duties to another party or personal interest
A conflict arises if representing one client harms another, or if responsibilities to another client, former client, or the lawyer's own personal interests materially restrict the representation.

Related Questions
What is required for a lawyer's duty of competence besides academic knowledge?When expertise is lacking in a specialized area, what is the ethical path forward for a lawyer?What is specifically mentioned as a practical measure for demonstrating technological aptitude for lawyers?When does a conflict of interest exist regarding client representation?For in-house counsel, who constitutes the organization's client?Where is the lawyer's primary duty of candor demonstrated?How long does the duty of confidentiality typically extend after representation ends?What is a crucial requirement when handling client funds held in trust or escrow accounts?What constitutes an ethical breach regarding communication failures?Which activity constitutes the Unauthorized Practice of Law (UPL) for a paralegal?What is the primary concern regarding client interests when a lawyer moves between firms?What is the purpose of an internal 'ethical escalation ladder' for in-house counsel facing business pressure?