Communicating Sequential Process~(CSP) is nowadays a popular concurrency model in which threads/processes communicate by exchanging data through channels.
Channels help in orchestrating concurrent processes but do not solve per-se \emph{data races}.
To prevent data races in the channel model, many programming languages rely on type systems to express ownership and behavioural restrictions such as immutability.
However, dynamically-typed languages require run-time mechanisms because
of the lack of type information at compile-time.

In this paper, we propose to augment channels with four different permission transfer semantics.
We explore two mechanisms to implement such permission transfers at run time: write barriers and partial-read barriers.
To validate our approach we implemented a channel framework in Pharo, and we extended it with different permission transfer semantics.
We report on performance measurements of both (a) the transfer overhead on a single object and on a graph of objects, and (b) the per-object access overhead incurred by ownership checks.
This work stands as a cornerstone of future work on adaptive optimizations for permission transfer channels.