If there is, then you will need to decide which of the projectinfo records to show like say the latest (e.g., higher [Job Number] equals later project info).
SELECT p.ID, i.ID AS _IDx, p._ReadOnly, p._UserGroupID, p._OrganizationID
, p.[Project Name], i.[Job Number], i.[Description], i.[Project Manager]
FROM Projects p
LEFT OUTER JOIN (
SELECT *
, ROW_NUMBER() OVER(PARTITION BY ID, _UserGroupID ORDER BY [Job Number] DESC) rn
FROM ProjectInfo
) i on p.ID = i.ID
AND i._UserGroupID = '1ee8022b-1fe4-4bce-9a80-c9ba672737b2'
AND i.rn = 1
WHERE p._Active = 1
ORDER BY [Project Name];
Best regards,
Kevin