Thorarinn Gunnarsson is the pseudonym of an American author of science fiction and fantasy. For several years, he claimed to be of Icelandic birth but recently admitted that this (along with much of his biography) was false.
His 1990s novels Make Way For Dragons!, Human, Beware! and Dragons on the Town featured a dragon named Dalvenjah Foxfire for whom DALnet is (indirectly) named. Dragon's Domain appears to take place much earlier in the same continuity, establishing some elements of the setting.