Before revision: Liquid democracy allows an agent to either vote directly over the available alternatives(candidates) of an election, or to delegate her voting rights to another agent (her guru) who can then vote on her behalf. In the academic literature and industrial applications of liquid democracy, each agent is usually allowed to nominate only one guru per election.
After revision: Liquid democracy allows an agent to either vote directly over the available alternatives(candidates) of an election, or to delegate her voting rights to someone they trust. Most of the liquid democracy literature and implementations allow each voter to nominate only one guru per election.