yes, you are (trying to go across too many tables). Try an exists statement where the project's convertedOpTaskOriginatorID is the same as the user ID and then get to the home team ID from there. Your non-working part of the filter above would translate to:
EXISTS:a:$$OBJCODE=USER
EXISTS:a:ID=FIELD:convertedOpTaskOriginatorID
EXISTS:a:homeTeamID=61006659003b57bb36ef697d14262125