How does aleph-im distribute requests across the right blockchains?

Question

blockchain

There is a project - https://aleph.im/#/architecture
It has the ability to quickly create decentralized applications, everything seems to be quite clear from the api and documentation, but it is not clear how it distributes requests across the desired blockchain (if I formulated it correctly, of course).

That is, it is possible to work with the network of Ether, Solana, Dot and other coins. it’s just interesting how it determines which blockchain we work with, that is, for example, using the commenting system on the site and this product, can we send a comment from the Solana network, for example, and the ether, to one post at the same time?