Для Tumbleweed запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/home:plater/Tumbleweed/home:plater.repo
zypper refresh
zypper install libktorrent
Для Factory запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/home:plater/Factory/home:plater.repo
zypper refresh
zypper install libktorrent
Для 16.0 запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/home:plater/16.0/home:plater.repo
zypper refresh
zypper install libktorrent