Only in narrow, specific circumstances — BC restricts dual agency far more tightly than Ontario restricts its designated-representation equivalent.
Short answer
Rarely, and only under conditions BC's regulator spells out explicitly. BCFSA's own consumer guide states "dual agency in BC is only permitted in very specific circumstances because of the conflict of interest it creates," and lists exactly three conditions that all have to be true: the property is in a remote location, that location is under-served by real estate professionals, and it is impracticable for the parties to be served by different professionals.
Even when those three conditions are met, BCFSA's guide is clear that the professional must modify the duties they owe: they cannot advise either party on what to offer or accept, because doing so would put one client's interests ahead of the other's. And process matters as much as the substance — "all parties must agree and sign forms indicating they understand the limitations on the duties owed to them but wish to proceed." There is no verbal-consent version of this in BC.
Outside those narrow conditions, BC brokerages use designated agency instead — BCFSA states directly that "most brokerages in BC operate under designated agency," where "there is a real estate professional(s) assigned to represent you" and "your information will be kept confidential from every other real estate professional at the brokerage" — structurally the closer analogue to what Ontario calls designated representation, and the model most BC brokerages default to when they have clients on both sides of a deal.
BC's own Real Estate Services Act does not itself spell out dual or designated agency in its text — section 10(b.1) defers licensees' educational and conduct requirements to rules made by the Superintendent, which is where this level of detail actually lives, not the statute. That is a real gap in what the Act says on its face, not evidence that BC has no such framework — the framework exists, and BCFSA's consumer guide above is where it is published in practice.
See also: managing broker, British Columbia and can you represent both sides in Ontario.
A 30-minute call is enough to see where AI keeps designated-agency confidentiality walls consistent across a book of clients.