I did a quick check on this and the functionality to automatically link Linux or UNIX Hyper-v guests is not yet in Lansweeper.
I've linked your topic to the existing feature request. As a workaround, you could use the following report:
Select Top 1000000 tblAssets.AssetID,
tblAssets.AssetName,
tblAssets.IPAddress,
tblAssets.Lastseen,
tHost.AssetName As [Hyper-V host]
From tblAssets
Inner Join tblAssetCustom On tblAssets.AssetID = tblAssetCustom.AssetID
Inner Join TblHyperVGuestNetwork
On tblAssets.Mac = TblHyperVGuestNetwork.MacAddress
Inner Join tblHyperVGuest On tblHyperVGuest.hypervguestID =
TblHyperVGuestNetwork.HyperVGuestID
Left Join tblAssets tHost On tHost.AssetID = tblHyperVGuest.AssetID
Where tblAssetCustom.State = 1
Order By [Hyper-V host]
Theoretically, you can also fiddle with the database to get it working.