Yes, You can...
// MilliSatoshi are the native unit of the Lightning Network. A milli-satoshi
// is simply 1/1000th of a satoshi. There are 1000 milli-satoshis in a single
// satoshi. Within the network, all HTLC payments are denominated in
// milli-satoshis. As milli-satoshis aren't deliverable on the native
// blockchain, before settling to broadcasting, the values are rounded down to
// the nearest satoshi.
