Dispatcher reported a flight crew reported an inflight fuel leak. Flight crew continued to destination and landed safely.

Narrative

Flight xxx called on Satcom to talk with Maintenance Control due to 2 EICAS messages regarding fuel. While talking with Maintenance Control; the crew described the issue as a fuel imbalance which sends them to the fuel leak checklist. After a lengthy discussion between the 3 of us (crew; maintenance; me) we could not determine definitively if there was a fuel leak so the crew said they could continue to monitor and would call back if the imbalance got worse. We made plan B of landing in ZZZZ. A short time later; as the flight was flying over ZZZZ the crew called again and asked to be patched with Maintenance Control. The imbalance was continuing to grow and I asked them if they wished to land at ZZZZ. As we were discussing this; one of the chief dispatchers had the checklist and the other came over and stated that company personnel recommended NOT going to ZZZZ since we had major issues the last time we diverted there. I relayed this information to the crew; but ultimately we agreed that if they wanted to land immediately; ZZZZ was the best option and that Operations would support them with anything they needed. After a lengthy discussion; the crew said they were comfortable with the remaining fuel that was being calculated since the weather was CAVOK at ZZZZ1. We made another plan B and a plan C (since we were now over land) that if the fuel continued to be an issue we would land first at ZZZZ2 and then ZZZZ3 once we got further down the flight plan. The chief dispatcher and I continued to monitor the fuel at all the position reports. When the flight landed in ZZZZ1 the Captain called and said when they pulled in the gate that they could see the fuel streaming from the left engine and maintenance on the field confirmed the leak. They also landed with an imbalance of approximately 5400lbs and a total fuel of approximately 9000lbs. (planned remaining fuel was 18;300 lbs.)