As a Primary student my teammate participated in Soccer Lightweight Primary in Nagoya and Soccer Lightweight in Montreal. In rules it says:
9 International Competition
Maximum teamsize is 4 members for RoboCupJunior 2018.13 Starting in 2017, Soccer Lightweight team members can participate in the World Championship only twice. After their second participation, they need to move to Soccer Open. Note that counting starts with the 2017 World Championship.
Since he participated in Primary, not Secundary, can he participate in Soccer Lightwright this year ?