# Flow networks: Push flow on either edges but not both!

I have a flow network with random capacities on edges, is there some way to add a constraint of the type (push flow on either one of these two edges but not on both)?

I'm not sure if this is correct or not, but I think the maximum independent set problem can be reduced to the problem I stated above, let's call our graph $S$ and make a flow network $G$ with a source node $src$ and sink node $sink$.

For each vertex $v \in V(S)$ we make an edge $(src \rightarrow sink)$ with capacity 1 in $G$ and for each edge $(A \rightarrow B) \in E(S)$ we add the constraint to pass flow on either the edge that corresponds to $A$ or $B$ in $G$ . The resulting maximum flow on $G$ is the cardinality of the maximum independent set on $S$ and the set of saturated edges in $G$ are the nodes in the maximum independent set of $S$ .

Is my intuition correct or not?