Canthans questin in Tyria? Y/N?

Sorry, but the search function is down again, and I can't seem to locate my answer in this or the Riverside forum.

Once Canthans go to Lion's Arch, can they learn skills from quests in Kryta, the Jungle, and the Desert? Or are all those skill quests closed to them?

yes, you'll still get quest skill reward, but so far from what i can see, for tyria quests, there isn't any skill reward specific for ritualists and assassins. so for those with prophecies campaign, if either your secondary or primary is non-ritualists/assassin, you can save some skill points by completing quests with skill rewards to get warrior, necro, monk, ele, ranger and/or mesmer skills.

Also note you will only get Core & Prophecies skills from those quest's. You will have to use Skill Point's and buy from a Cantha Skill Trainer if you want Faction's only skills.

Best thing rush them to ember light camp than cap elites.